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Ren J, Shi P, Zu X, Ding L, Liu F, Wang Y, Wu Y, Shi G, Wu Y, Li L. Challenges and future prospects of the 2D material-based composites for microwave absorption. NANOSCALE 2025. [PMID: 40391401 DOI: 10.1039/d5nr00925a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2025]
Abstract
The widespread use of electronic devices inevitably brings about the problem of electromagnetic pollution. As a result, it is important and urgent to develop efficient absorbing materials to alleviate increasing pollution issues. Recently, two-dimensional (2D) material-based microwave absorbers have attracted wide attention in microwave absorption due to their unique lamellar structure, large specific surface area, low density, good thermal and chemical stability. Through various modulation strategies such as structure configuration, pore/defect engineering, heteroatom doping and coupling of functional materials, 2D materials or 2D material-based composites exhibit excellent microwave absorption performance. In this review, the absorption mechanism is firstly introduced and then the latest progress in 2D material-based microwave absorbers is reviewed in depth. The challenges and future prospects for graphene, h-BN, and MXene-based microwave absorbers are discussed in the final part. This timely review aims to provide guidance or stimulation to develop advanced multifunctional 2D material-based microwave absorbers in this rapidly blossoming field.
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Affiliation(s)
- Jia Ren
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, PR China.
| | - Ping Shi
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, PR China.
| | - Xinyan Zu
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, PR China.
| | - Lei Ding
- Centre for Atomaterials and Nanomanufacturing, School of Science, RMIT University, Melbourne, Victoria, Australia
| | - Feng Liu
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, PR China.
- Shenyang Key Laboratory of Advanced Energy Materials and Renewable Resources, Shenyang, 110870, PR China
| | - Yuzheng Wang
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, PR China.
- Shenyang Key Laboratory of Advanced Energy Materials and Renewable Resources, Shenyang, 110870, PR China
| | - Yuhan Wu
- School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang, 110870, PR China
| | - Guimei Shi
- School of Science, Shenyang University of Technology, Shenyang, 110870, PR China
| | - Yusheng Wu
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, PR China.
- Shenyang Key Laboratory of Advanced Energy Materials and Renewable Resources, Shenyang, 110870, PR China
| | - Laishi Li
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, PR China.
- Shenyang Key Laboratory of Advanced Energy Materials and Renewable Resources, Shenyang, 110870, PR China
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2
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Chen J, Guo Z, Wang J, Zhang X. Microscopic morphology modulation and microwave absorption properties of nano-ZnO. NANOSCALE 2025; 17:10969-10984. [PMID: 40202450 DOI: 10.1039/d4nr05469e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/10/2025]
Abstract
Electromagnetic waves can cause varying degrees of damage to the human body and equipment, making the development of unique nanostructured materials with excellent reflection loss (RL), minimal thickness, wide frequency band, and light weight highly valued. To enhance the efficiency of microwave absorption, this study employs the hydrothermal method, using copper sheets as substrates, and varying the concentration of precursors, reaction time, and reaction temperature, successfully preparing three different morphologies of nano-ZnO (flake-like, flower-like, and rod-like). The electromagnetic properties and wave absorption performance of the obtained three morphologies were analyzed. The microwave loss effect of ZnO mainly comes from the sample's dielectric polarization, interfacial polarization, and multiple reflections. By comparing the different morphologies of ZnO, rod-like ZnO has better impedance matching and attenuation capabilities. When mixed with paraffin at a mass ratio of 20 wt% and a thickness of d = 3.5 mm, the sample exhibits good wave absorption performance (-11.02 dB) and an effective absorption bandwidth of 2.42 GHz. When rod-like ZnO is mixed with paraffin wax at 50 wt%, the maximum scattering loss is -19.2 dB and the effective absorption bandwidth is 1.5 GHz at a thickness of 4.5 mm and 16.82 GHz. There are significant differences in the absorption of electromagnetic waves by nano-ZnO with different microstructures, making it particularly important to study the absorption characteristics and microwave loss mechanisms of ZnO with specific morphologies.
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Affiliation(s)
- Jin Chen
- Jin Chen-School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Zhifeng Guo
- Jin Chen-School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Jiani Wang
- Jin Chen-School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Xuan Zhang
- Jin Chen-School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
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Zhang Z, Hu C, Li J, Chen Z, Li Y, Xu T, Zhao D, Meng X, Sun Z, Zhou Z. Reinforced Interfacial Polarization in Composited High-Entropy-Alloy Nanoparticles/Graphene for Efficient Microwave Absorption. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2025; 21:e2411058. [PMID: 40123322 DOI: 10.1002/smll.202411058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2024] [Revised: 01/22/2025] [Indexed: 03/25/2025]
Abstract
High-entropy alloys, particularly nanoparticles (HEANPs) composed of multiple magnetic elements, have shown promise as efficient agents to address electromagnetic challenges. However, their limited magnetic loss capabilities can be inadequate when confronted with dielectric loss requirements. Herein, using a carbothermal reduction strategy, a composite microwave absorber consisting of HEANPs (CoNiCuFeMnPbMgAl) and graphene sheets (HEANPs/G), in which the graphene sheets are incorporated to mitigate dielectric limitations, is synthesized. Benefiting from the natural resonance and electric dipole polarization induced by HEANPs and graphene defects respectively, an excellent reflection loss (RL) of less than -30 dB is achieved in all samples. Notably, both the experimental and first-principles results indicate that the interface polarization can be reinforced by increasing the charge transfer at the interface to further improve the absorption behavior, which is attributed to the enhanced electrical resistivity caused by the composing element species gradually increasing to eight. Consequently, the optimized octonary HEANPs/G achieves an RL value of -62.30 dB (7.20 GHz, 3.13 mm) with a broad effective absorption bandwidth of 4.16 GHz. This study establishes a relationship between multiple loss behaviors and microwave absorption capabilities in high-entropy composites, while also providing a pathway to compensate for the shortcomings of single magnetic loss materials.
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Affiliation(s)
- Zhengyu Zhang
- School of Physics, Harbin Institute of Technology, Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Chenglong Hu
- Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310012, P. R. China
| | - Jun Li
- School of Physics, Harbin Institute of Technology, Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Zegeng Chen
- School of Physics, Harbin Institute of Technology, Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Yixing Li
- Key Laboratory for Anisotropy and Texture of Materials (MOE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, P. R. China
| | - Tongtong Xu
- School of Physics, Harbin Institute of Technology, Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Dongpeng Zhao
- School of Physics, Harbin Institute of Technology, Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Xianghui Meng
- School of Physics, Harbin Institute of Technology, Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Zhuo Sun
- Key Laboratory for Anisotropy and Texture of Materials (MOE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, P. R. China
| | - Zhongxiang Zhou
- School of Physics, Harbin Institute of Technology, Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China
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Ogawa T, Tanaka M, Kawashima N, Ito T, Nakayama K, Kato T, Kitaoka S. Controllable Crystalline Phases of Multi-Cation Oxides. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2025; 12:e2412280. [PMID: 40285617 PMCID: PMC12120718 DOI: 10.1002/advs.202412280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2024] [Revised: 03/21/2025] [Indexed: 04/29/2025]
Abstract
Multi-cation oxides have been extensively studied over the past decade for various solid-state applications. The source of their functionality lies in a wide compositional search space derived from countless cation combinations and diverse crystal structures formed in metal oxides. However, due to the vast space and complexity of structure control, material exploration has been limited to dispersed compositions under different synthesis conditions, hindering their systematic understanding and rational design. Here, a crystalline-phase map of multi-cation rare-earth titanates is reported, where three types of crystals, i.e., cubic and hexagonal, and orthorhombic phases, emerge depending on the composition and temperature and exhibit systematic changes. The crystal structures of each phase are thoroughly characterized with X-ray diffraction, electron microscopy, and first-principles calculations. The configurational entropies calculated from the crystallographic information support the phase-boundary shift between hexagonal and orthorhombic phases observed in the phase map. Further, a machine learning procedure is proposed for constructing the map from sparse experimental data, allowing predictive exploration for stable crystalline phases across a large compositional space. These findings may facilitate the design of multi-cation oxides with a desired structure dispersed in a large search space.
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Affiliation(s)
- Takafumi Ogawa
- Nanostructures Research LaboratoryJapan Fine Ceramics Center2‐4‐1 Mutsuno, Atsuta‐kuNagoyaAichi456‐8587Japan
| | - Makoto Tanaka
- Materials Research and Development LaboratoryJapan Fine Ceramics Center2‐4‐1 Mutsuno, Atsuta‐kuNagoyaAichi456‐8587Japan
| | - Naoki Kawashima
- Materials Research and Development LaboratoryJapan Fine Ceramics Center2‐4‐1 Mutsuno, Atsuta‐kuNagoyaAichi456‐8587Japan
| | - Taishi Ito
- Nanostructures Research LaboratoryJapan Fine Ceramics Center2‐4‐1 Mutsuno, Atsuta‐kuNagoyaAichi456‐8587Japan
| | - Kei Nakayama
- Nanostructures Research LaboratoryJapan Fine Ceramics Center2‐4‐1 Mutsuno, Atsuta‐kuNagoyaAichi456‐8587Japan
| | - Takeharu Kato
- Nanostructures Research LaboratoryJapan Fine Ceramics Center2‐4‐1 Mutsuno, Atsuta‐kuNagoyaAichi456‐8587Japan
| | - Satoshi Kitaoka
- Materials Research and Development LaboratoryJapan Fine Ceramics Center2‐4‐1 Mutsuno, Atsuta‐kuNagoyaAichi456‐8587Japan
- Tokyo University of Technology1404‐1, KatakuraHachiojiTokyo192‐0982Japan
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5
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Huang W, Liu X, Wang Y, Feng J, Huang J, Dai Z, Yang S, Pei S, Zhong J, Gui X. Ultra‑Broadband and Ultra-High Electromagnetic Interference Shielding Performance of Aligned and Compact MXene Films. NANO-MICRO LETTERS 2025; 17:234. [PMID: 40287922 PMCID: PMC12034605 DOI: 10.1007/s40820-025-01750-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2025] [Accepted: 03/25/2025] [Indexed: 04/29/2025]
Abstract
With the rapid development of electronic detective techniques, there is an urgent need for broadband (from microwave to infrared) stealth of aerospace equipment. However, achieving effective broadband stealth primarily relies on the composite of multi-layer coatings of different materials, while realizing broadband stealth with a single material remains a significant challenge. Herein, we reported a highly compact MXene film with aligned nanosheets through a continuous centrifugal spraying strategy. The film exhibits an exceptional electromagnetic interference shielding effectiveness of 45 dB in gigahertz band (8.2-40 GHz) and 59 dB in terahertz band (0.2-1.6 THz) at a thickness of 2.25 μm, owing to the high conductivity (1.03 × 106 S m-1). Moreover, exceptionally high specific shielding effectiveness of 1.545 × 106 dB cm2 g⁻1 has been demonstrated by the film, which is the highest value reported for shielding films. Additionally, the film exhibits an ultra-low infrared emissivity of 0.1 in the wide-range infrared band (2.5-16.0 μm), indicating its excellent infrared stealth performance for day-/nighttime outdoor environments. Moreover, the film demonstrates efficient electrothermal performance, including a high saturated temperature (over 120 °C at 1.0 V), a high heating rate (4.4 °C s-1 at 1.0 V), and a stable and uniform heating distribution. Therefore, this work provides a promising strategy for protecting equipment from multispectral electromagnetic interference and inhibiting infrared detection.
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Affiliation(s)
- Weiqiang Huang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Xuebin Liu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Yunfan Wang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Jiyong Feng
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Junhua Huang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Zhenxi Dai
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Shaodian Yang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
- National Key Laboratory of Materials for Integrated Circuits, Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China
| | - Songfeng Pei
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, People's Republic of China
- School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang, 110016, People's Republic of China
| | - Jing Zhong
- Key Lab of Structure Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin, 150090, People's Republic of China
| | - Xuchun Gui
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
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Li S, Meng X, Zhu C, Xu W, Sun Y, Lu X, Dai Y. Revolutionizing Inorganic Nanofibers: Bridging Functional Elements to a Future System. ACS NANO 2025; 19:14579-14604. [PMID: 40193232 DOI: 10.1021/acsnano.4c17688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2025]
Abstract
The advancement of intelligent ecosystems depends upon not only technological innovation but also a multidimensional understanding of material-world interactions. This theoretical transformation prompts increasing demands for multifunctional materials exhibiting hierarchical organization across multiple length scales. Inorganic nanofibers demonstrate potential in bridging the gap between microscale and macroscale through their three-dimensional architectures. However, their inherent brittleness, primarily resulting from inferior structural integrity poses, significantly limits their current applications. This critical limitation highlights the urgent necessity for developing fabrication strategies that simultaneously enhance the mechanical flexibility and robustness, ensuring reliable performance under extreme operational conditions. This comprehensive review systematically examines brittle mechanism fracture through multiscale analysis including molecular, nanoscale, and microscale dimensions. It presents innovative methodologies integrating simulation-guided structural design with advanced in situ characterization techniques capable of real-time monitoring under a practical stress-strain process. Furthermore, the discussion progresses to address contemporary challenges and emergent solutions in oxide nanofiber engineering, providing strategic insights for developing mechanically robust flexible systems with stable functional properties. Ultimately, this review examines the potential of inorganic nanofibers to overcome the limitations of nano powder materials and achieve their promising real-world applications.
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Affiliation(s)
- Shujing Li
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Xiangyu Meng
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Chuntong Zhu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Wanlin Xu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Yueming Sun
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Xiaofeng Lu
- Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yunqian Dai
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
- Purple Mountain Laboratories, Nanjing 211111, P. R. China
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7
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Wang D, Song C, Dang S, Guo J, Yu H, Zhao H, Zhao Y, Chen J, Xu X. High-Entropy Ceramic Aerogel with Ultrahigh Thermomechanical Properties. ACS APPLIED MATERIALS & INTERFACES 2025; 17:18636-18644. [PMID: 40079838 DOI: 10.1021/acsami.4c22818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/15/2025]
Abstract
Materials for extreme-condition thermal insulation need to simultaneously withstand complex thermomechanical stresses while retaining their insulating properties at high temperatures. Ceramic aerogels are attractive candidates, but conventional low-entropy ceramics usually suffer from formidable grain growth with severe volume shrinkage and strength degradation, resulting in catastrophic failures. Herein, a high-entropy (La1/4Sm1/4Gd1/4Y1/4)2Zr2O7 (ZLSGY) aerogel is made through an element-phase design, realizing enhanced lattice distortion and sluggish diffusion effects to achieve fine-grain strengthening under extreme conditions. The resulting aerogel exhibits excellent mechanical flexibility, achieving compressive, tensile fracture, and bending strains of 98%, 52%, and 99%, respectively, as well as an ultralow thermal conductivity of 24.79 mW m-1 K-1 at 25 °C and 82.19 mW m-1 K-1 at 1000 °C. Moreover, the aerogel achieves exceptional thermomechanical stability with a working temperature of up to 1400 °C (less than 3% strength degradation after 105 high-temperature deformation cycles). This high-entropy ceramic aerogel presents a promising material system for thermal insulation in extreme environments.
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Affiliation(s)
- Duola Wang
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, PR China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, PR China
| | - Chuanyun Song
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, PR China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, PR China
| | - Shixuan Dang
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, PR China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, PR China
| | - Jingran Guo
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, PR China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, PR China
| | - Hongxuan Yu
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, PR China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, PR China
| | - Han Zhao
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, PR China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, PR China
| | - Yingde Zhao
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, PR China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, PR China
| | - Jiali Chen
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, PR China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, PR China
| | - Xiang Xu
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, PR China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, PR China
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Collado I, Vázquez-López A, Heredia S, de la Vega J, Jiménez-Suárez A, Maestre D, Prolongo SG. Electromagnetic Interference Shielding of a Sequential Dual-Curing Thiol-Epoxy System Reinforced with GNPs with High Shape Memory. ACS APPLIED MATERIALS & INTERFACES 2025; 17:18954-18970. [PMID: 40071755 DOI: 10.1021/acsami.5c02049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2025]
Abstract
Modern electronics face several challenges during operation, such as interference of disruptive electromagnetic signals and high temperatures within a limited space. Both electromagnetic interference (EMI) and thermal management could be tackled simultaneously by employing smart efficient materials with high thermal and electrical conductivity. A dual-curing epoxy system, a new subset of adaptable materials, could potentially solve those challenges, with the proper selection of the reinforcement. Moreover, its manufacturing and synthesis process, which involves a sequential curing stage, constitute an attractive, selective, and fast methodology. The thiol-epoxy chemistry allows the synthesis of an epoxy system with high shape-memory capabilities while retaining optimal mechanical properties. Herein, dual-curing epoxy systems reinforced with graphene nanoplatelets (GNPs) are manufactured. The influence of the GNPs content is evaluated, which greatly increases upon loading while retaining a high shape-memory fixation and recovery rates (near 99%). A maximum EMI shielding efficiency of 24 dB is achieved for the higher GNPs content, which is endowed by the high electrical conductivity of the system. Moreover, a modelization of the near-field and far-field EMI shielding is reported, which agrees with experimental observation. This report shows the potential and multifunctional nature of dual-curing epoxy composites for EMI shielding and shape-memory-related application.
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Affiliation(s)
- Ignacio Collado
- Materials Science and Engineering Area, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Madrid, Spain
| | - Antonio Vázquez-López
- Materials Science and Engineering Area, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Madrid, Spain
| | - Simón Heredia
- Department of Materials Physics, Faculty of Physics, Complutense University of Madrid, 28040 Madrid, Spain
| | - Jimena de la Vega
- IMDEA Materials Institute, C/Eric Kandel, 2 Getafe, Madrid 28906, Spain
| | - Alberto Jiménez-Suárez
- Materials Science and Engineering Area, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Madrid, Spain
| | - David Maestre
- Department of Materials Physics, Faculty of Physics, Complutense University of Madrid, 28040 Madrid, Spain
| | - Silvia G Prolongo
- Materials Science and Engineering Area, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Madrid, Spain
- Instituto de Investigación de Tecnologías para la Sostenibilidad. Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Madrid, Spain
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9
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Chen G, Zhang T, Zhang L, Tao K, Chen Q, Wu H. Dual relaxation behaviors driven by a homogeneous and stable dual-interface charge layer based on an EGaIn absorber. MATERIALS HORIZONS 2025; 12:1629-1639. [PMID: 39660567 DOI: 10.1039/d4mh01564a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2024]
Abstract
Interface engineering, by modulating defect distribution and impedance at interfaces and inducing interfacial polarization, has proven to be an effective strategy for optimizing dielectric properties. However, the inherent incompatibility between heterogeneous phases presents a significant challenge in constructing multi-heterointerfaces and understanding how their distribution influences dielectric performance. Herein, we constructed an EGaIn@Ni/NiO/Ga2O3 composite structure by employing a low-intensity ultrasound-assisted galvanic replacement reaction followed by high-temperature annealing. The controlled addition of Ni salts allowed for the fine-tuning of Ni, NiO, and In concentrations and their spatial distribution within the interfacial architecture. Annealing treatment induced a transition from amorphous to crystalline phases, triggering dual relaxation behaviors between EGaIn/Ni and NiO/Ga2O3. Additionally, significant charge accumulation was observed at the NiO/Ga2O3 interface, likely due to the substantial work function difference between Ni and NiO, coupled with the low barrier height between EGaIn and Ni, which facilitates electron migration. Consequently, the optimized samples exhibited a maximum absorption bandwidth of 7.92 GHz, which is the highest among the EGaIn-based absorbers reported in the literature. This work not only elucidates the mechanism by which multi-heterogeneous interfacial distributions regulate the dielectric properties but also provides an effective approach for modulating the electromagnetic wave performance of liquid metals.
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Affiliation(s)
- Geng Chen
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Tao Zhang
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Limin Zhang
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Kai Tao
- The Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Qiang Chen
- State Key Laboratory of Solidification Processing, Northwestern Polytechnic University, Xi'an 710072, China.
| | - Hongjing Wu
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China.
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10
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Liu X, Duan Y, Wu N, Li G, Guo Y, Liu J, Zhu N, Wang Q, Wang L, Xu Z, Wei H, Wang G, Zhang Z, Zhang S, Zhou W, Ma T, Wang T. Modulating Electromagnetic Genes Through Bi-Phase High-Entropy Engineering Toward Temperature-Stable Ultra-Broadband Megahertz Electromagnetic Wave Absorption. NANO-MICRO LETTERS 2025; 17:164. [PMID: 39994124 PMCID: PMC11850694 DOI: 10.1007/s40820-024-01638-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2024] [Accepted: 12/23/2024] [Indexed: 02/26/2025]
Abstract
Magnetic absorbers with high permeability have significant advantages in low-frequency and broadband electromagnetic wave (EMW) absorption. However, the insufficient magnetic loss and inherent high conductivity of existing magnetic absorbers limit the further expansion of EMW absorption bandwidth. Herein, the spinel (FeCoNiCrCu)3O4 high-entropy oxides (HEO) are successfully constructed on the surface of FeCoNiCr0.4Cu0.2 high-entropy alloys (HEA) through low-temperature oxygen bath treatment. On the one hand, HEO and HEA have different magnetocrystalline anisotropies, which is conducive to achieving continuous natural resonance to improve magnetic loss. On the other hand, HEO with low conductivity can serve as an impedance matching layer, achieving magneto-electric co-modulation. When the thickness is 5 mm, the minimum reflection loss (RL) value and absorption bandwidth (RL < - 5 dB) of bi-phase high-entropy composites (BPHEC) can reach - 12.8 dB and 633 MHz, respectively. The RCS reduction value of multilayer sample with impedance gradient characteristic can reach 18.34 dB m2. In addition, the BPHEC also exhibits temperature-stable EMW absorption performance, high Curie temperature, and oxidation resistance. The absorption bandwidth maintains between 593 and 691 MHz from - 50 to 150 °C. This work offers a new and tunable strategy toward modulating the electromagnetic genes for temperature-stable ultra-broadband megahertz EMW absorption.
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Affiliation(s)
- Xiaoji Liu
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China
| | - Yuping Duan
- Key Laboratory of Solidification Control and Digital Preparation Technology, School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China.
| | - Nan Wu
- National Key Laboratory of Electromagnetic Effect and Security On Marine Equipment, China Ship Development and Design Center, Wuhan, 430205, People's Republic of China
| | - Guangming Li
- Wuhan Second Ship Design and Research Institute, Wuhan, 430205, People's Republic of China
| | - Yuan Guo
- Key Laboratory of Solidification Control and Digital Preparation Technology, School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China
| | - Jiangyong Liu
- Key Laboratory of Solidification Control and Digital Preparation Technology, School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China
| | - Ning Zhu
- Key Laboratory of Solidification Control and Digital Preparation Technology, School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China
| | - Qiang Wang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China
| | - Lin Wang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China
| | - Zichen Xu
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China
| | - Hao Wei
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China
| | - Guojun Wang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China
| | - Zhijia Zhang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China
| | - Songsong Zhang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China.
| | - Wenjun Zhou
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China
| | - Teng Ma
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China
| | - Tongmin Wang
- Key Laboratory of Solidification Control and Digital Preparation Technology, School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China.
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11
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Sun Y, Wang Y, Liu D, Jiang H, Ding B, Guo J, Dai S. MoS 2-Coated MOF-Derived Hollow Heterostructures for Electromagnetic Wave Absorption. ACS APPLIED MATERIALS & INTERFACES 2025. [PMID: 39982447 DOI: 10.1021/acsami.4c23019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2025]
Abstract
Structural design constitutes one of the crucial approaches for augmenting the wave-absorbing capacity of electromagnetic wave (EMW) absorbers, and the incorporation of cavity structures represents a typical methodology therein. In this work, the MoS2-coated metal-organic framework (MOF)-derived Hollow-MoS2@CNS@CoS2 composite materials (HCNSs) were prepared by combining tannic acid-protected etching, carbonization, and hydrothermal methods. Especially, HCNS700, which possessed both a hollow structure and a layered heterogeneous structure, demonstrated excellent EMW absorption properties. It attained an optimal reflection loss of -63.63 dB at 16.4 GHz and -58.97 dB at 10.4 GHz, along with an extremely low thickness. In addition, the radar cross section simulation demonstrated that HCNS700 possessed excellent electromagnetic stealth capabilities. Its excellent performance is put down to the multiple loss mechanisms brought by the special structure, including multiple scattering of EMW caused by the hollow structure, interface polarization caused by the heterogeneous interfaces of MoS2, CoS2, and the carbon matrix, dipole polarization caused by element doping and defects, and optimization of impedance matching by MoS2. This research offers a novel concept for the design of EMW-absorbing materials with hollow heterogeneous layered structures.
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Affiliation(s)
- Yue Sun
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan 250061, P. R. China
- Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
| | - Yanxiang Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan 250061, P. R. China
- Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
| | - Dongming Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan 250061, P. R. China
- Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
| | - Haotian Jiang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan 250061, P. R. China
- Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
| | - Bohan Ding
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan 250061, P. R. China
- Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
| | - Jinghe Guo
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan 250061, P. R. China
- Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
| | - Shichao Dai
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan 250061, P. R. China
- Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
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12
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Yuan M, Weible AH, Azadi F, Li B, Cui J, Lv H, Che R, Wang X. Advancements in high-entropy materials for electromagnetic wave absorption. MATERIALS HORIZONS 2025; 12:1033-1057. [PMID: 39620951 DOI: 10.1039/d4mh01168f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2024]
Abstract
Widespread electromagnetic (EM) interference and pollution have become major issues due to the rapid advancement of fifth-generation (5G) wireless communication technology and devices. Recent advances in high-entropy (HE) materials have opened new opportunities for exploring EM wave absorption abilities to address the issues. The lattice distortion effect of structures, the synergistic effect of multi-element components, and multiple dielectric/magnetic loss mechanisms can offer extensive possibilities for optimizing the balance between impedance matching and attenuation ability, resulting in superior EM wave absorption performance. This review gives a comprehensive review on the recent progress of HE materials for EM wave absorption. We begin with the fundamentals of EM wave absorption materials and the superiority of HE absorbers. Discussions of advanced synthetic methods, in-depth characterization techniques, and electronic properties, especially with regard to regulatable electronic structures through band engineering of HE materials are highlighted. This review also covers current research advancements in a wide variety of HE materials for EM wave absorption, including HE alloys, HE ceramics (mainly HE oxides, carbides, and borides), and other novel HE systems. Finally, insights into future directions for the further development of high-performance HE EM wave absorbers are provided.
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Affiliation(s)
- Mingyue Yuan
- Institute of Optoelectronics, Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China.
| | - Alan H Weible
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, USA.
| | - Fatemeh Azadi
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, USA.
| | - Bangxin Li
- Institute of Optoelectronics, Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China.
| | - Jiacheng Cui
- Institute of Optoelectronics, Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China.
| | - Hualiang Lv
- Institute of Optoelectronics, Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China.
| | - Renchao Che
- Institute of Optoelectronics, Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China.
| | - Xiaoguang Wang
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, USA.
- Sustainability Institute, The Ohio State University, Columbus, OH, 43210, USA
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13
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Ma X, Tan L, Xu J, Hao J. Co-Ni/C Composite Derived from N, S-Codoped Graphene Decorate Metal-Organic Framework toward Microwave Attenuation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2025; 41:3684-3694. [PMID: 39887190 DOI: 10.1021/acs.langmuir.4c05127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2025]
Abstract
Metal-organic frameworks (MOFs) exhibit highly adjustable porosity, structure, and versatility, properties that render them promising for electromagnetic wave (EMW) absorption applications. However, the impedance matching of these composites is poor in practical applications, thereby compromising their EMW absorption performance. In this study, a novel EMW absorbing composite was synthesized by a solution-thermal method combined with a subsequent pyrolysis process. Specifically, we introduced heteroatom (N and S) codoped graphene (N, S-Gr) into the Co-Ni MOF, forming N, S-Gr/CoNi/C. Graphene was endowed with abundant defect and disorder sites through the codoping of nitrogen and sulfur, which enhanced interfacial polarization and dipole polarization. When nickel and cobalt were added in a 1:1 ratio, the minimum reflection loss (RLmin) of the N, S-Gr/Co-Ni/C composite reached -47.7 dB at 4.24 GHz, and the resultant material exhibited the best absorption properties. As a result, this composite is considered to be an ideal candidate for the development of highly effective EMW absorbers.
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Affiliation(s)
- Xiaowei Ma
- Specializing of Chemical Engineering and Technology, Lanzhou University of Technology, Lanzhou 730050, China
| | - Lin Tan
- Specializing of Chemical Engineering and Technology, Lanzhou University of Technology, Lanzhou 730050, China
| | - Jiaqi Xu
- Xian SAFTY Energy Technology Co., Ltd., Xian 710000, China
| | - Jiaoyang Hao
- Specializing of Chemical Engineering and Technology, Lanzhou University of Technology, Lanzhou 730050, China
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14
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Zhang H, Kuang K, Zhang Y, Sun C, Yuan T, Yin R, Fan Z, Che R, Pan L. Multifunctional Carbon Foam with Nanoscale Chiral Magnetic Heterostructures for Broadband Microwave Absorption in Low Frequency. NANO-MICRO LETTERS 2025; 17:133. [PMID: 39910004 PMCID: PMC11799491 DOI: 10.1007/s40820-025-01658-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2024] [Accepted: 01/02/2025] [Indexed: 02/07/2025]
Abstract
The construction of carbon nanocoil (CNC)-based chiral-dielectric-magnetic trinity composites is considered as a promising approach to achieve excellent low-frequency microwave absorption. However, it is still challenging to further enhance the low frequency microwave absorption and elucidate the related loss mechanisms. Herein, the chiral CNCs are first synthesized on a three-dimensional (3D) carbon foam and then combined with the FeNi/NiFe2O4 nanoparticles to form a novel chiral-dielectric-magnetic trinity foam. The 3D porous CNC-carbon foam network provides excellent impedance matching and strong conduction loss. The formation of the FeNi-carbon interfaces induces interfacial polarization loss, which is confirmed by the density functional theory calculations. Further permeability analysis and the micromagnetic simulation indicate that the nanoscale chiral magnetic heterostructures achieve magnetic pinning and coupling effects, which enhance the magnetic anisotropy and magnetic loss capability. Owing to the synergistic effect between dielectricity, chirality, and magnetism, the trinity composite foam exhibits excellent microwave absorption performance with an ultrabroad effective absorption bandwidth (EAB) of 14 GHz and a minimum reflection of loss less than - 50 dB. More importantly, the C-band EAB of the foam is extended to 4 GHz, achieving the full C-band coverage. This study provides further guidelines for the microstructure design of the chiral-dielectric-magnetic trinity composites to achieve broadband microwave absorption.
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Affiliation(s)
- Hao Zhang
- School of Physics, Dalian University of Technology, Dalian, 116024, Liaoning, People's Republic of China
| | - Kaili Kuang
- School of Physics, Dalian University of Technology, Dalian, 116024, Liaoning, People's Republic of China
| | - Yifeng Zhang
- School of Physics, Dalian University of Technology, Dalian, 116024, Liaoning, People's Republic of China
| | - Chen Sun
- School of Physics, Dalian University of Technology, Dalian, 116024, Liaoning, People's Republic of China
| | - Tingkang Yuan
- School of Physics, Dalian University of Technology, Dalian, 116024, Liaoning, People's Republic of China
| | - Ruilin Yin
- School of Physics, Dalian University of Technology, Dalian, 116024, Liaoning, People's Republic of China
| | - Zeng Fan
- School of Physics, Dalian University of Technology, Dalian, 116024, Liaoning, People's Republic of China
| | - Renchao Che
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Fudan University, Shanghai, 200438, People's Republic of China.
| | - Lujun Pan
- School of Physics, Dalian University of Technology, Dalian, 116024, Liaoning, People's Republic of China.
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15
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Jin H, Liu M, Wang L, You W, Pei K, Cheng HW, Che R. Design and fabrication of 1D nanomaterials for electromagnetic wave absorption. Natl Sci Rev 2025; 12:nwae420. [PMID: 39830391 PMCID: PMC11737396 DOI: 10.1093/nsr/nwae420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2024] [Revised: 09/25/2024] [Accepted: 11/20/2024] [Indexed: 01/22/2025] Open
Abstract
The design and fabrication of high-performance electromagnetic wave (EMW) absorbing materials are essential in developing electronic communication technology for defense and civilian applications. These materials function by interacting with EMWs, creating various effects such as polarization relaxation, magnetic resonance, and magnetic hysteresis in order to absorb EMWs. Significant progress has been made to improve the dimensional performance of such materials, emphasizing the 'thin, light, broad, and strong' functional specifications. One-dimensional (1D) nanostructures are characterized by high surface area, low density, and unique electromagnetic properties, providing promising solutions to address some of the challenges in facilitating multiple reflections and wideband resonances, which are crucial for effective EMW attenuation. This paper provides an overview of recent advances in exploring 1D structures for enhancing EMW absorption and their controllability. The design and fabrication of nanofibers, nanowires, and other 1D nanostructures are highlighted. The advantages of 1D nanomaterials in EMW absorption are also described. Challenges and future directions are discussed, focusing on developing new design concepts and fabrication methods for achieving high-performance and lightweight EMW absorbers and enhancing fundamental understanding of EMW absorption mechanisms.
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Affiliation(s)
- Hongdu Jin
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
| | - Min Liu
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
| | - Lei Wang
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
| | - Wenbin You
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
| | - Ke Pei
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
| | - Han-Wen Cheng
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
| | - Renchao Che
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Academy for Engineering & Technology, Fudan University, Shanghai 200438, China
- College of Physics, Donghua University, Shanghai 201620, China
- School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
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16
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Sun H, Xu J, Wu R, Chen J, Liu Y, Li K, Chang A, Zhang B. Synergistic Entropy Engineering with Oxygen Vacancy: Modulating Microstructure for Extraordinary Thermosensitive Property in ReNbO 4 Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2025; 21:e2408952. [PMID: 39887548 DOI: 10.1002/smll.202408952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2024] [Revised: 01/09/2025] [Indexed: 02/01/2025]
Abstract
The pursuit of high precision and stability simultaneously in high-temperature thermistor fields is longstanding. However, most spinel or perovskite-structured thermosensitive materials struggle to tolerate prolonged high-temperature environments at the expense of sensitivity and stability. Here, a novel entropy engineering strategy involving vacancies is proposed to balance sensitivity and stability for fergusonite-structured ReNbO4 (Re is a rare earth element) material in extreme environments. The synergistic effect of entropy stabilization and allovalent substitution on the A-site generates unusually high concentrations of oxygen vacancy that improves the electronic structure and structural stability. Moreover, entropy engineering involving oxygen vacancies introduces potent and stable microstructural features including twinned domains, lattice distortion, and lattice reconfigurations, which facilitate stability and accuracy at a wide temperature range, thereby synergistically contributing to excellent thermosensitive properties. As-prepared high-entropy ceramics show low aging drift rates and high-temperature measurement accuracy over the extended temperature range of 223-1423 K, exhibiting a competitive temperature coefficient of resistivity of 0.223%/K at 1423 K. This work not only provides valuable insights into the design of high-temperature thermosensitive sensors but also establishes an effective paradigm for entropy engineering involving vacancies.
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Affiliation(s)
- Hao Sun
- State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianan Xu
- State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ruifeng Wu
- State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jia Chen
- State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yafei Liu
- State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China
| | - Kai Li
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry of CAS, Changchun, 130022, China
| | - Aimin Chang
- State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China
| | - Bo Zhang
- State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China
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Li Z, Xu Y, Wu L, Sun Y, Zhang M, Dou Z, Zhao J, Yan Y, Wang G. Carbon Nanocage-in-Microcage Structure With Tunable Carbon-Coated Nickel as a Microwave Absorber With Infrared Stealth Property. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2025; 12:e2412890. [PMID: 39686734 PMCID: PMC11809319 DOI: 10.1002/advs.202412890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2024] [Revised: 11/25/2024] [Indexed: 12/18/2024]
Abstract
The rational design of microwave absorption (MA) material featuring light weight, wide absorption bandwidth, and infrared stealth property is crucial for military stealth and health protection but remains challenging. Herein, an innovative N-doped carbon nanocage-in-microcage structure with tunable carbon-coated Ni (NC/Ni(HS)) is reported via a reliable Ni-catalyzed and Ni-templated method. The hierarchically hollow structure of nanocage-in-microcage composites can optimize the impedance matching and respond to multiple reflections and scattering of incident microwaves and infrared waves. Moreover, the magnetic Ni nanoparticles improve the synergistic interactions between confined heterointerfaces and promote interfacial polarization. Such an ingenious structure endows NC/Ni(HS) with outstanding MA performance and infrared stealth properties. Specifically, NC/Ni(HS)-10 with an optimal dielectric property, exhibits excellent MA performance. At an ultralow fill loading of 4 wt.%, a wide absorption bandwidth of 6.16 GHz is achieved at a thickness of 2.63 mm, and a strong reflection loss of -63.67 dB is obtained at a thickness of 2.00 mm. In addition, NC/Ni(HS)-10 shows a low infrared emissivity in the range of 3‒14 µm, which is the key to compatibility with infrared stealth. This work paves the way for the design of advanced MA materials that meet the requirements of multispectral-compatible stealth.
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Affiliation(s)
- Zhaoyang Li
- College of Architecture & Civil EngineeringShangqiu Normal UniversityShangqiu476000China
| | - Yang Xu
- Center for Advanced Studies in Precision InstrumentsSchool of Material Science and EngineeringHainan UniversityHaikouHainan570228China
| | - Lihong Wu
- Center for Advanced Studies in Precision InstrumentsSchool of Material Science and EngineeringHainan UniversityHaikouHainan570228China
| | - Yu Sun
- College of Architecture & Civil EngineeringShangqiu Normal UniversityShangqiu476000China
| | - Mingnan Zhang
- Center for Advanced Studies in Precision InstrumentsSchool of Material Science and EngineeringHainan UniversityHaikouHainan570228China
| | - Zhifeng Dou
- Center for Advanced Studies in Precision InstrumentsSchool of Material Science and EngineeringHainan UniversityHaikouHainan570228China
| | - Jinchuan Zhao
- Center for Advanced Studies in Precision InstrumentsSchool of Material Science and EngineeringHainan UniversityHaikouHainan570228China
| | - Yongzhu Yan
- Center for Advanced Studies in Precision InstrumentsSchool of Material Science and EngineeringHainan UniversityHaikouHainan570228China
| | - Guizhen Wang
- College of Architecture & Civil EngineeringShangqiu Normal UniversityShangqiu476000China
- Center for Advanced Studies in Precision InstrumentsSchool of Material Science and EngineeringHainan UniversityHaikouHainan570228China
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18
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Luo L, Ju J, Wu Y, Wan X, Li W, Li Y, Jiang H, Hu Y, Li C. Lattice-Strain Engineering of High-Entropy-Oxide Nanoparticles: Regulation by Flame Spray Pyrolysis with Ultrafast Quenching. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2025:e2418856. [PMID: 39865793 DOI: 10.1002/adma.202418856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2024] [Revised: 01/21/2025] [Indexed: 01/28/2025]
Abstract
The lattice-strain engineering of high-entropy-oxide nanoparticles (HEO-NPs) is considered an effective strategy for achieving outstanding performance in various applications. However, lattice-strain engineering independent of the composition variation still confronts significant challenges, with existing modulation techniques difficult to achieve mass production. Herein, a novel continuous-flow synthesis strategy by flame spray pyrolysis (FSP) is proposed, which air varying flow rates is introduced for fast quenching to alter the cooling rate and control the lattice strain of HEO-NPs. Experimental results demonstrate that as the flow rate of air increases from 0 L to 24 L min-1, the cooling rate has increased by more than ten times, and the tensile strain of the HEO-NPs increases by 2.75%. Utilizing the oxygen evolution reaction (OER) activity as an indicator, it is observed that the overpotential to achieve a current density of 10 mA cm-2 is reduced by 25 mV. Importantly, this approach enables the simple and efficient regulation of lattice strain in HEO-NPs (110 mg min-1). Thus, this study provides a new approach for both the mass production and regulation of lattice strain in HEO-NPs.
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Affiliation(s)
- Lingli Luo
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Environmental Friendly Materials Technical Service Platform, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Jie Ju
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Environmental Friendly Materials Technical Service Platform, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Yingjie Wu
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Environmental Friendly Materials Technical Service Platform, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiaowei Wan
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Environmental Friendly Materials Technical Service Platform, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Wei Li
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng, 475004, China
| | - Yuhang Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Environmental Friendly Materials Technical Service Platform, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Hao Jiang
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Environmental Friendly Materials Technical Service Platform, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Yanjie Hu
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Environmental Friendly Materials Technical Service Platform, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Chunzhong Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Environmental Friendly Materials Technical Service Platform, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
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Liang H, Hui S, Zhang L, Tao K, Chen Q, Lu W, Wu H. High-Density Dual Atoms Pairs Coupling for Efficient Electromagnetic Wave Absorbers. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2025; 21:e2408396. [PMID: 39604231 DOI: 10.1002/smll.202408396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2024] [Revised: 11/13/2024] [Indexed: 11/29/2024]
Abstract
Dual atoms (DAs), characterized by flexible structural tunability and high atomic utilization, hold significant promise for atom-level coordination engineering. However, the rational design with high-density heterogeneous DAs pairs to promote electromagnetic wave (EMW) absorption performance remains a challenge. In this study, high-density Ni─Cu pairs coupled DAs absorbers are precisely constructed on a nitrogen-rich carbon substrate, achieving an impressive metal loading amount of 4.74 wt.%, enabling a huge enhancement of the effective absorption bandwidth (EAB) of EMW from 0 to 7.8 GHz. Furthermore, the minimum reflection loss (RLmin) is -70.96 dB at a matching thickness of 3.60 mm, corresponding to an absorption of >99.99% of the incident energy. Both experimental results and theoretical calculations indicate that the synergistic effect of coupled Ni─Cu pairs DAs sites results in the transfer of electron-rich sites from the initial N sites to the Cu sites, which induces a strong asymmetric polarization loss by this redistribution of local charge and significantly improves the EMW absorption performance. This work not only provides a strategy for the preparation of high-density DA pairs but also demonstrates the role of coupled DA pairs in precisely tuning coordination symmetry at the atomic level.
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Affiliation(s)
- Hongsheng Liang
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Shengchong Hui
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Limin Zhang
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Kai Tao
- The Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Qiang Chen
- State Key Laboratory of Solidification Processing, Northwestern Polytechnic University, Xi'an, 710072, P. R. China
| | - Wei Lu
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Hongjing Wu
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
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20
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Xiong X, Liu Z, Zhang R, Yang L, Liang G, Zhou X, Li B, Zhang H, Lv H, Che R. Atomic-Level Electric Polarization in Entropy-Driven Perovskites for Boosting Dielectric Response. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2025; 37:e2415351. [PMID: 39610164 DOI: 10.1002/adma.202415351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2024] [Revised: 11/20/2024] [Indexed: 11/30/2024]
Abstract
Dielectric oxides with robust relaxation responses are fundamental for electronic devices utilized in energy absorption, conversion, and storage. However, the structural origins governing the dielectric response remain elusive due to the involvement of atomically complex compositional and structural environments. Herein, configurational entropy is introduced as a regulatory factor to precisely control the structural heterogeneity in representative perovskite dielectric oxides. Through advanced structural and electric field visualization studies, a novel quantitative relationship is established between atomic-level structural disorder-induced electric field polarization and macroscopic dielectric properties. The results indicate that the degree of atomic delocalization in perovskite oxides exhibits a near-parabolic trend with increasing entropy, reaching a maximum in medium-entropy perovskite. Correspondingly, the atomic electric field vectors display significant asymmetrical distribution, thus greatly enhancing angstrom-scale electric field polarization. Then, it is experimentally proven that entropy-driven electric polarization can improve the dielectric relaxation behavior characterized by broader frequency and stronger intensity of electromagnetic energy absorption, with improvements of approximately 160% and 413% compared to structurally homogeneous control. This study unveils the quantitative correlation between angstrom-scale electric field polarization and dielectric response in perovskite oxides, offering a novel perspective for exploring the structure-property relationship in dielectric materials.
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Affiliation(s)
- Xuhui Xiong
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Zhengwang Liu
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Ruixuan Zhang
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Liting Yang
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Guisheng Liang
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Xiaodi Zhou
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Bangxin Li
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Huibin Zhang
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Hualiang Lv
- Institute of Optoelectronics, Fudan University, Shanghai, 200433, China
| | - Renchao Che
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
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21
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Zhang L, Du J, Tang P, Zhao X, Hu C, Dong Y, Zhang X, Liu N, Wang B, Peng R, Zhang Y, Wu G. Regulation of PPy Growth States by Employing Porous Organic Polymers to Obtain Excellent Microwave Absorption Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2406001. [PMID: 39263765 DOI: 10.1002/smll.202406001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Revised: 08/22/2024] [Indexed: 09/13/2024]
Abstract
Regulating the different growth states of polypyrrole (PPy) is a key strategy for obtaining PPy composites with high electromagnetic wave (EMW) absorption properties. This work finds that the growth states of PPy is regulated by controlling the amount of pyrrole added during the preparation of composites, so as to regulate the development of conductive networks to obtain excellent EMW absorption performance. The POP/PPy-200 composite achieves an effective absorption bandwidth (EAB) of 6.24 GHz (11.76-18.00 GHz) at a thickness of only 2.34 mm, covering 100% of the Ku band. The minimum reflection loss of -73.05 dB can be demonstrated at a thickness of only 2.29 mm, while at the same time showing an EAB of 5.96 GHz to meet the requirements of "thin", "light", "wide", and "strong". Such excellent EMW absorption performance is attributed to the conductive loss caused by the regulation of the growth states of PPy and the polarization loss caused by the heterostructure. This work also addresses the key challenge that porous organic polymers (POPs) cannot be applied to EMW absorption due to poor conductivity and providing new insights into the candidates for EMW absorbing materials.
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Affiliation(s)
- Liwen Zhang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Jiawei Du
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Peng Tang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Xueying Zhao
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Chuangwei Hu
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Yu Dong
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Xuyang Zhang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Nana Liu
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Bo Wang
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Ruihui Peng
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
| | - Yaohong Zhang
- School of Physics, Northwest University, Xi'an, 710127, China
| | - Guohua Wu
- Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Harbin, 150001, China
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui, 241000, China
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22
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Deng C, Liu R, Wu P, Wang T, Xi S, Tao D, He Q, Chao Y, Zhu W, Dai S. Thermally Stable High-Entropy Layered Double Hydroxides for Advanced Catalysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2406685. [PMID: 39385649 DOI: 10.1002/smll.202406685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2024] [Revised: 09/10/2024] [Indexed: 10/12/2024]
Abstract
Layered double hydroxides (LDHs), especially high-entropy LDHs (HE-LDHs), have gained increasing attention. However, HE-LDHs often possess poor thermal stability, restricting their applications in thermo-catalysis. Herein, a novel complexing nucleation method is proposed for engineering HE-LDHs with enhanced thermal stability. This approach precisely controls the nucleation of metal ions with different solubility products, achieving homogeneous nucleation and effectively mitigating phase segregation and transformation at elevated temperatures. The prepared HE-LDH sample demonstrated exceptional thermal stability at temperatures up to 300 °C, outperforming all previously reported LDHs. Importantly, these HE-LDHs preserve both Lewis and Brønsted acidic sites, enabling the 100% removal of aromatic sulfides and alkaline nitrogen compounds from fuel oils in thermo-catalytic oxidation reactions. Experimental and characterization findings reveal that the metal-hydroxide bonds in the prepared HE-LDHs are strengthened by associated hydroxyl groups, inducing negative thermal expansion and augmenting the presence of acidic sites, thereby ensuring structural stability and enhancing catalytic activity. This study not only proposes a strategy for engineering HE-LDHs with remarkable thermal stability but also highlights potential applications of LDHs in thermo-catalysis.
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Affiliation(s)
- Chang Deng
- School of Chemistry and Chemical Engineering, School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575
| | - Ruoyu Liu
- School of Chemistry and Chemical Engineering, School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Peiwen Wu
- School of Chemistry and Chemical Engineering, School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Tao Wang
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Shibo Xi
- Agency for Science, Technology, and Research (A*STAR), Pesek Road Jurong Island, Singapore, 627833, Singapore
| | - Duanjian Tao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China
| | - Qian He
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575
| | - Yanhong Chao
- College of Chemical Engineering and Environment, State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, China
| | - Wenshuai Zhu
- School of Chemistry and Chemical Engineering, School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
- College of Chemical Engineering and Environment, State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, China
| | - Sheng Dai
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
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23
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Ma R, Song J, Ding H, Han Q, Tang X, Lv F, Wen S, Yin J, Ang EH. Decoding the entropy-stabilized matrix of high-entropy layered double hydroxides: Harnessing strain dynamics for peroxymonosulfate activation and tetracycline degradation. J Colloid Interface Sci 2024; 680:676-688. [PMID: 39580920 DOI: 10.1016/j.jcis.2024.11.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2024] [Revised: 11/15/2024] [Accepted: 11/17/2024] [Indexed: 11/26/2024]
Abstract
The current understanding of the mechanism of high-entropy layered double hydroxide (LDH) on enhancing the efficiency of activating peroxymonosulfate (PMS) remains limited. This work reveals that a strong strain effect, driven by high entropy, modulates the structure of FeCoNiCuZn-LDH (HE-LDH) as evidenced by geometric phase analysis (GPA) and density functional theory (DFT) calculations. Compared to FeCoNiZn-LDH and FeCoNi-LDH with weaker strain effects, the high entropy-driven strain effect in HE-LDH shortens metal-oxygen-hydrogen (MOH) bond lengths, allows system to be in a constant steady state during catalysis, reduces the leaching of active M-OH sites, and enhances the adsorption capacity of these sites and the excess strain strength of the interfacial stretches the IO-O of the PMS, facilitates reactive oxygen species (·OH, SO4·-, 1O2 and O2·-) generation, and thereby improving the efficiency of PMS in degrading tetracycline (TC). Consequently, HE-LDH demonstrated a 90% TC degradation within 3 min, maintained over 92% TC removal across a wide pH range (3-11), and achieved over 90% degradation performance after 6 cycles. This study reports the first use of high-entropy LDH material as a non-homogeneous catalyst and provides insights into the extremely different catalytic behaviors of high entropy mechanisms for the activation of PMS.
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Affiliation(s)
- Rongyao Ma
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Jianhua Song
- Yunnan Key Laboratory of Crystalline Porous Organic Functional Materials, College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China
| | - Huiwei Ding
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Qiaofeng Han
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Xin Tang
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Fujian Lv
- Yunnan Key Laboratory of Crystalline Porous Organic Functional Materials, College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China.
| | - Shizheng Wen
- Jiangsu Key Laboratory for the Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223001, China
| | - Jingzhou Yin
- Jiangsu Key Laboratory for the Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223001, China.
| | - Edison Huixiang Ang
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore.
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24
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Sun C, Lan D, Jia Z, Gao Z, Wu G. Kirkendall Effect-Induced Ternary Heterointerfaces Engineering for High Polarization Loss MOF-LDH-MXene Absorbers. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2405874. [PMID: 39206598 DOI: 10.1002/smll.202405874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2024] [Revised: 08/13/2024] [Indexed: 09/04/2024]
Abstract
Heterogeneous interfacial engineering has garnered widespread attention for optimizing polarization loss and enhancing the performance of electromagnetic wave absorption. A novel Kirkendall effect-assisted electrostatic self-assembly method is employed to construct a metal-organic framework (MOF, MIL-88A) decorated with Ni-Fe layered double hydroxide (LDH), forming a multilayer nano-cage coated with Ti3C2Tx. By modulating the surface adsorption of Ti3C2Tx on LDH, the heterointerfaces in MOF-LDH-MXene ternary composites exhibit excellent interfacial polarization loss. Additionally, the Ni-Fe LDH@Ti3C2Tx nano-cage exhibits a large specific surface area, abundant defects, and a large number of heterojunction structures, resulting in excellent electromagnetic wave absorption performance. The MIL-88A@Ni-Fe LDH@Ti3C2Tx-1.0 nano-cage achieves a reflection loss value of -46.7 dB at a thickness of 1.4 mm and an effective absorption bandwidth of 5.12 GHz at a thickness of 1.8 mm. The heterojunction interface composed of Ni-Fe LDH and Ti3C2Tx helps to enhance polarization loss. Additionally, Ti3C2Tx forms a conductive network on the surface, while the cavity between the MIL-88A core and the Ni-Fe LDH shell facilitates multiple attenuations by increasing the transmission path of internal incident waves. This work may reveal a new structural design of multi-component composites by heterointerfaces engineering for electromagnetic wave absorption.
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Affiliation(s)
- Chunhua Sun
- School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan, 442002, P. R. China
- Institute of Materials for Energy and Environment, State Key Laboratory Breeding Base of New Fiber Materials and Modern Textile, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Di Lan
- School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan, 442002, P. R. China
| | - Zirui Jia
- Institute of Materials for Energy and Environment, State Key Laboratory Breeding Base of New Fiber Materials and Modern Textile, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Zhenguo Gao
- Institute of Materials for Energy and Environment, State Key Laboratory Breeding Base of New Fiber Materials and Modern Textile, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Guanglei Wu
- Institute of Materials for Energy and Environment, State Key Laboratory Breeding Base of New Fiber Materials and Modern Textile, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
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25
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Wu Z, Yang L, Yang X, Liang G, Liu M, Chen G, Wu Y, Liu M, Wen M, Lai Y, Che R. Electrochemical Switching of Electromagnetism by Hierarchical Disorder Tailored Atomic Scale Polarization. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2410466. [PMID: 39375978 DOI: 10.1002/adma.202410466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2024] [Revised: 09/08/2024] [Indexed: 10/09/2024]
Abstract
High-frequency electronic response governs a broad spectrum of electromagnetic applications from radiation protection, and signal compatibility, to energy recovery. Despite various efforts to manage electric conductivity, dynamic control over dielectric polarization for real-time electromagnetic modulation remains a notable challenge. Herein, an electrochemical lithiation-driven hierarchical disordering strategy is demonstrated for actively modulating electromagnetic properties. The controllable formation and diffusion of coherent interfaces and cation vacancies tailor the coupling of atomic electric field and thus the locally polarized domains, which leads to the reversible electromagnetic transparency/absorption switching with a tunable range of -0.8--20.4 dB for the reflection loss and a broad operation bandwidth of 4.6 GHz. Compared to traditional methods of heteroatomic doping, hydrogenation, mechanical deformation, and phase transition, the electrochemical strategy shows a larger regulation scope of dielectric permittivity with the maximum increase ratios of 260% and 1950% for real and imaginary parts, respectively. This enables the construction of various device architectures including the adaptive window and pixelated metasurface. The results offer opportunities to achieve intelligent electromagnetic devices and pave an avenue to rejuvenate various electromagnetic functions of semiconductive oxides.
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Affiliation(s)
- Zhengchen Wu
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Liting Yang
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Xiaofen Yang
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Guisheng Liang
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Min Liu
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Guanyu Chen
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Yuyang Wu
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Minmin Liu
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Meichen Wen
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
| | - Yuxiang Lai
- Pico Electron Microscopy Center, Innovation Institute for Ocean Materials Characterization, Center for Advanced Studies in Precision Instruments, Hainan University, Haikou, 570228, China
| | - Renchao Che
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, 200438, China
- School of Materials Science & Engineering, Tongji University, Shanghai, 201804, China
- College of Physics, Donghua University, Shanghai, 201620, China
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26
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Rezaei H, Soltani-Mohammadi F, Dogari H, Ghafuri H, Peymanfar R. Plasma-assisted doping of pyrolyzed corn husk strengthened by MoS 2/polyethersulfone for fascinating microwave absorbing/shielding and energy saving properties. NANOSCALE 2024; 16:18962-18975. [PMID: 39292151 DOI: 10.1039/d4nr02576h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
To address the ever-increasing electromagnetic pollution, numerous efforts have been made. In this case, biomass-derived materials as green, affordable, lightweight, capable, and sustainable microwave-absorbing materials have become a research hotspot; meanwhile, transition metal-based microwave absorbers and sulfide structures as polarizable electromagnetic absorbers have intrigued researchers. Alternatively, plasma treatment as a novel strategy has been applied in different fields, and doping strategies are in the spotlight to modify the microwave-absorbing features of materials. Thus, herein, corn husk biomass was pyrolyzed and doped with N via plasma treatment, followed by coating with MoS2 nanoflowers to promote its microwave-absorbing characteristics. More interestingly, the influence of absorbing media was carefully evaluated using polyethersulfone (PES) and polyethylene (PE) as polymeric matrices. The as-developed MoS2/N-doped pyrolyzed corn husk (PCH) demonstrated outstanding electromagnetic interference shielding effectiveness (EMISE) based on its absorption covering the entire K-band frequency with ≈100% shielding, a fascinating reflection loss (RL) of -95.32 dB at 21.28 GHz, and outstanding efficient bandwidth (EBW) of 7.61 GHz (RL ≤ -10) with a thickness of only 0.45 mm. It is noteworthy that the energy-saving features of the final composites were precisely investigated using an infrared (IR) absorption approach.
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Affiliation(s)
- Hassan Rezaei
- Department of Health Safety and Environment (HSE), Energy Institute of Higher Education, P.O. Box 39177-67746, Saveh, Iran.
| | - Fereshteh Soltani-Mohammadi
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, P.O. Box 16846-13114, Tehran, Iran.
| | - Haniyeh Dogari
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, P.O. Box 16846-13114, Tehran, Iran.
| | - Hossein Ghafuri
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, P.O. Box 16846-13114, Tehran, Iran.
| | - Reza Peymanfar
- Department of Health Safety and Environment (HSE), Energy Institute of Higher Education, P.O. Box 39177-67746, Saveh, Iran.
- Department of Science, Iranian Society of Philosophers, Tehran, Iran
- Sustainable Development of Industrial Laboratory (SDILAB) CO., Tehran, Iran
- Department of Chemical Engineering, Energy Institute of Higher Education, P.O. Box 39177-67746, Saveh, Iran
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27
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Liang H, Hui S, Chen G, Shen H, Yun J, Zhang L, Lu W, Wu H. Discovery of Deactivation Phenomenon in NiCo 2S 4/NiS 2 Electromagnetic Wave Absorbent and Its Reactivation Mechanism. SMALL METHODS 2024; 8:e2301600. [PMID: 38185797 DOI: 10.1002/smtd.202301600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 12/28/2023] [Indexed: 01/09/2024]
Abstract
Over the past century, extensive research has been carried out on various types of microwave absorption (MA) materials, primarily emphasizing mechanism, performance, and even toward smart device. However, the deactivation, a crucial concern for practical applications, has long been long-neglected. In this work, an in-depth exploration of the deactivation mechanism reveals a significant competition between metal and oxygen, leading to the replacement of the S-M (M = Ni and Co) bond by a new S─O bond on the surface of absorber. This substitution initiates a series of collapse effect that introduces additional defective sites and diminishes the potential for charge transport. Subsequently, passive and active anti-deactivation strategies are developed to target the deactivation. The passive strategy involved intentionally creating electron-deficient structures at the initial Ni and Co sites in the crystal through the Fe doping engineering, with the objective of preventing the generation of S─O bonds. Furthermore, the active anti-deactivation strategy allows for the precise control of absorber deactivation and reactivation by employing accelerated thermodynamic and kinetic methods, enabling a reversible transformation of S-M through competitive reactions with S─O bonds. Finally, a fast deactivation and reactivation method is first proposed promising to stimulate further innovations and breakthroughs in practical applications.
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Affiliation(s)
- Hongsheng Liang
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Shengchong Hui
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Geng Chen
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Hao Shen
- Department of Applied Physics, School of Science, Chang'an University, Xi'an, 710064, P. R. China
| | - Jijun Yun
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Limin Zhang
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Wei Lu
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Hongjing Wu
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
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28
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Wang R, Huang Q, Hong G, Liu Y, Liu C, Li J, Li L, Qu Q. Eco-friendly versatile shielding revolution: Tannin tailored bamboo waste composite with wave-absorbing, flame retardancy, and antibacterial abilities. Int J Biol Macromol 2024; 277:134162. [PMID: 39069061 DOI: 10.1016/j.ijbiomac.2024.134162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 07/06/2024] [Accepted: 07/23/2024] [Indexed: 07/30/2024]
Abstract
The swift evolution of fifth-generation technology has intensified the need for lightweight, high-efficiency, and low-reflection multifunctional electromagnetic interference shielding materials, crucial in combating escalating electromagnetic pollution in complex application environments. To tackle these challenges, an innovative solution has emerged: a biocomposite crafted from discarded bamboo materials. This innovation incorporates a meticulously engineered functional coating composed of tannic acid, boric acid, and polyvinyl alcohol. Additionally, the integration of highly conductive Ti3C2Tx (MXene) nanosheets onto the surface of bamboo powders enhances the EMI shielding efficiency of composites, achieving an impressive ∼40.9 dB. Meanwhile, significant improvements in mechanical reinforcement have been achieved, along with increases in the relative values of key performance indicators: tensile strength (89.8 %), tensile modulus (79.6 %), flexural strength (51.6 %), flexural modulus (35.1 %), and impact strength (45.4 %). Furthermore, the introduction of functional components grants the composite exceptional flame retardancy and antibacterial properties against both Gram-negative and Gram-positive bacteria. Beyond these strides, the utilization of bamboo waste as a composite pioneer a paradigm shift in waste utilization, converting refuse into invaluable resources.
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Affiliation(s)
- Rong Wang
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Qiude Huang
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Gonghua Hong
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China; BMI Center for Biomass Materials and Nanointerfaces, College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
| | - Yan Liu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Chengyang Liu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Jialiang Li
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Lei Li
- State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan, Yunnan University, Kunming 650091, China.
| | - Qing Qu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China.
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29
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Liu J, Zhang S, Qu D, Zhou X, Yin M, Wang C, Zhang X, Li S, Zhang P, Zhou Y, Tao K, Li M, Wei B, Wu H. Defects-Rich Heterostructures Trigger Strong Polarization Coupling in Sulfides/Carbon Composites with Robust Electromagnetic Wave Absorption. NANO-MICRO LETTERS 2024; 17:24. [PMID: 39331290 PMCID: PMC11436618 DOI: 10.1007/s40820-024-01515-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Accepted: 08/16/2024] [Indexed: 09/28/2024]
Abstract
Defects-rich heterointerfaces integrated with adjustable crystalline phases and atom vacancies, as well as veiled dielectric-responsive character, are instrumental in electromagnetic dissipation. Conventional methods, however, constrain their delicate constructions. Herein, an innovative alternative is proposed: carrageenan-assistant cations-regulated (CACR) strategy, which induces a series of sulfides nanoparticles rooted in situ on the surface of carbon matrix. This unique configuration originates from strategic vacancy formation energy of sulfides and strong sulfides-carbon support interaction, benefiting the delicate construction of defects-rich heterostructures in MxSy/carbon composites (M-CAs). Impressively, these generated sulfur vacancies are firstly found to strengthen electron accumulation/consumption ability at heterointerfaces and, simultaneously, induct local asymmetry of electronic structure to evoke large dipole moment, ultimately leading to polarization coupling, i.e., defect-type interfacial polarization. Such "Janus effect" (Janus effect means versatility, as in the Greek two-headed Janus) of interfacial sulfur vacancies is intuitively confirmed by both theoretical and experimental investigations for the first time. Consequently, the sulfur vacancies-rich heterostructured Co/Ni-CAs displays broad absorption bandwidth of 6.76 GHz at only 1.8 mm, compared to sulfur vacancies-free CAs without any dielectric response. Harnessing defects-rich heterostructures, this one-pot CACR strategy may steer the design and development of advanced nanomaterials, boosting functionality across diverse application domains beyond electromagnetic response.
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Affiliation(s)
- Jiaolong Liu
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China
| | - Siyu Zhang
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China
| | - Dan Qu
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China
| | - Xuejiao Zhou
- School of Advanced Materials and Nanotechnology, State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi'an, 710071, People's Republic of China
| | - Moxuan Yin
- School of Microelectronics, Xidian University, Xi'an, 710071, People's Republic of China
| | - Chenxuan Wang
- School of Microelectronics, Xidian University, Xi'an, 710071, People's Republic of China
| | - Xuelin Zhang
- School of Telecommunication Engineering, Xidian University, Xi'an, 710071, People's Republic of China
| | - Sichen Li
- School of Advanced Materials and Nanotechnology, State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi'an, 710071, People's Republic of China
| | - Peijun Zhang
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China
| | - Yuqi Zhou
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China
| | - Kai Tao
- The Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Mengyang Li
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China.
| | - Bing Wei
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China.
| | - Hongjing Wu
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China.
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30
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Hu F, Tang H, Wu F, Ding P, Zhang P, Sun W, Cai L, Fan B, Zhang R, Sun Z. Sn Whiskers from Ti 2SnC Max Phase: Bridging Dual-Functionality in Electromagnetic Attenuation. SMALL METHODS 2024; 8:e2301476. [PMID: 38183383 DOI: 10.1002/smtd.202301476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/07/2023] [Indexed: 01/08/2024]
Abstract
In the ever-evolving landscape of complex electromagnetic (EM) environments, the demand for EM-attenuating materials with multiple functionalities has grown. 1D metals, known for their high conductivity and ability to form networks that facilitate electron migration, stand out as promising candidates for EM attenuation. Presently, they find primary use in electromagnetic interference (EMI) shielding, but achieving a dual-purpose application for EMI shielding and microwave absorption (MA) remains a challenge. In this context, Sn whiskers derived from the Ti2SnC MAX phase exhibit exceptional EMI shielding and MA properties. A minimum reflection loss of -44.82 dB is achievable at lower loading ratios, while higher loading ratios yield efficient EMI shielding effectiveness of 42.78 dB. These qualities result from a delicate balance between impedance matching and EM energy attenuation via adjustable conductive networks; and the enhanced interfacial polarization effect at the cylindrical heterogeneous interface between Sn and SnO2, visually characterized through off-axis electron holography, also contributes to the impressive performance. Considering the compositional diversity of MAX phases and the scalable fabrication approach with environmental friendliness, this study provides a valuable pathway to multifunctional EM attenuating materials based on 1D metals.
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Affiliation(s)
- Feiyue Hu
- School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Haifeng Tang
- School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Fushuo Wu
- School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Pei Ding
- School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Peigen Zhang
- School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Wenwen Sun
- School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Longzhu Cai
- The State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096, P. R. China
| | - Bingbing Fan
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Rui Zhang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - ZhengMing Sun
- School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
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31
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Khade V, Wuppulluri M. Microwave Absorption Performance of Flexible Porous PVDF-MWCNT Foam in the X-Band Frequency Range. ACS OMEGA 2024; 9:35364-35373. [PMID: 39184473 PMCID: PMC11339829 DOI: 10.1021/acsomega.4c00995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 05/15/2024] [Accepted: 05/16/2024] [Indexed: 08/27/2024]
Abstract
Lightweight electromagnetic absorbers made of polymers and multiwall carbon nanotubes (MWCNTs) have attracted a lot of attention because of their potential to shield next-generation electronics devices from electromagnetic radiation without reflecting it back into space. In this research, a flexible foam composed of MWCNTs and polyvinylidene fluoride (PVDF) is developed. This foam is designed to be an electromagnetic shielding material that is both flexible and absorption-dominant, reducing electromagnetic interference. The solvent approach is used to fabricate the PVDF-MWCNT foam. It is discovered that the foam has a porosity of 88.9%. Each cell in the PVDF-MWCNT foam is formed in a porous layered manner. The foam demonstrates a dielectric constant (ϵ ' ) of around 7.19 and dielectric loss (ϵ " ) of 4.46 at 9.96 GHz as calculated from MATLAB using the Nicolson-Ross-Wire algorithm. This developed EM absorber exhibits a high shielding efficiency of 78.46 dB. With an ideal reflection loss of -26.5 dB, this absorber attains the desired outcomes. The electromagnetic shielding performance is supported by calculations of the impedance matching degree, which was found to be 0.54. The PVDF-MWCNT foam displayed absorption-dominant characteristics, with a significantly low shielding due to reflection. This newly developed foam EM absorber has proven itself capable in a variety of commercial and stealth-related applications.
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Affiliation(s)
- Vaishnavi Khade
- Center
for Functional Materials, Vellore Institute
of Technology, Vellore, Tamil Nadu 632014, India
- School
of Advanced Sciences, Vellore Institute
of Technology, Vellore, Tamil Nadu 632014, India
| | - Madhuri Wuppulluri
- Center
for Functional Materials, Vellore Institute
of Technology, Vellore, Tamil Nadu 632014, India
- School
of Advanced Sciences, Vellore Institute
of Technology, Vellore, Tamil Nadu 632014, India
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32
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Huang S, Qiu Z, Zhong J, Wu S, Han X, Hu W, Han Z, Cheng WN, Luo Y, Meng Y, Hu Z, Zhou X, Guo S, Zhu J, Zhao X, Li CC. High-Entropy Transition Metal Phosphorus Trichalcogenides for Rapid Sodium Ion Diffusion. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2405170. [PMID: 38838950 DOI: 10.1002/adma.202405170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 06/03/2024] [Indexed: 06/07/2024]
Abstract
High-entropy strategies are regarded as a powerful means to enhance performance in energy storage fields. The improved properties are invariably ascribed to entropy stabilization or synergistic cocktail effect. Therefore, the manifested properties in such multicomponent materials are usually unpredictable. Elucidating the precise correlations between atomic structures and properties remains a challenge in high-entropy materials (HEMs). Herein, atomic-resolution scanning transmission electron microscopy annular dark field (STEM-ADF) imaging and four dimensions (4D)-STEM are combined to directly visualize atomic-scale structural and electric information in high-entropy FeMnNiVZnPS3. Aperiodic stacking is found in FeMnNiVZnPS3 accompanied by high-density strain soliton boundaries (SSBs). Theoretical calculation suggests that the formation of such structures is attributed to the imbalanced stress of distinct metal-sulfur bonds in FeMnNiVZnPS3. Interestingly, the electric field concentrates along the two sides of SSBs and gradually diminishes toward the two-dimensional (2D) plane to generate a unique electric field gradient, strongly promoting the ion-diffusion rate. Accordingly, high-entropy FeMnNiVZnPS3 demonstrates superior ion-diffusion coefficients of 10-9.7-10-8.3 cm2 s-1 and high-rate performance (311.5 mAh g-1 at 30 A g-1). This work provides an alternative way for the atomic-scale understanding and design of sophisticated HEMs, paving the way for property engineering in multi-component materials.
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Affiliation(s)
- Song Huang
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Zanlin Qiu
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Jiang Zhong
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha, 410082, China
| | - Shengqiang Wu
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Xiaocang Han
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Wenchao Hu
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Ziyi Han
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China
| | - Wing Ni Cheng
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Yan Luo
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Yuan Meng
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Zuyang Hu
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xuan Zhou
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Shaojun Guo
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Jian Zhu
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha, 410082, China
| | - Xiaoxu Zhao
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Cheng Chao Li
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
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33
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Mandal D, Bhandari B, Mullurkara SV, Ohodnicki PR. All-Around Electromagnetic Wave Absorber Based on Ni-Zn Ferrite. ACS APPLIED MATERIALS & INTERFACES 2024; 16:33846-33854. [PMID: 38899405 PMCID: PMC11231975 DOI: 10.1021/acsami.4c06498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 06/09/2024] [Accepted: 06/12/2024] [Indexed: 06/21/2024]
Abstract
Exploring a convenient, scalable, yet effective broadband electromagnetic wave absorber (EMA) in the gigahertz (GHz) region is of high interest today to quench its expanding demand. Ni-Zn ferrite is considered as a potential EMA; however, their performance study as a scalable effective millimeter-length absorber is still limited. Herein, we investigated EM wave attenuation properties of Ni0.5Zn0.5Fe2O4 (NZF) samples substituting Mn ion in place of Fe3+ as well as Zn2+ within a widely used frequency range of 0.1-9 GHz. Through composition optimization, Ni0.5Zn0.4Mn0.1Fe2O4 (NZM0.1F) EMA demonstrates excellent microwave absorption performance accompanied by simultaneous maximum reflection loss (RL) of -50.2 dB and wide BW of 6.8 GHz (with RL < -10 dB, i.e., attenuation >90%) at an optimum thickness of 6 mm. Moreover, the attenuation constant significantly increases from ∼217 to 301 Np/m with Mn doping. The key contribution arises from magnetic-dielectric properties synergy along with enhanced dielectric and magnetic losses owing to cation chemistry and site occupation in spinel NZF. In addition, porosity is induced in the system by a controlled two-step heat treatment process that promotes total loss with multiple internal reflections of the EM wave. Furthermore, RL is simulated by varying incident EM wave angles for the NZM0.1F sample displaying its angle insensitivity up to 50°. Our results reveal NZM0.1F as a futuristic environment-friendly microwave absorber material that is suitable for practical high-frequency applications.
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Affiliation(s)
- Dipika Mandal
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Bishal Bhandari
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Suraj V Mullurkara
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Paul R Ohodnicki
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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34
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Zhang L, Jia J, Yan J. Challenges and Strategies for Synthesizing High Performance Micro and Nanoscale High Entropy Oxide Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309586. [PMID: 38348913 DOI: 10.1002/smll.202309586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 01/22/2024] [Indexed: 07/13/2024]
Abstract
High-entropy oxide micro/nano materials (HEO MNMs) have shown broad application prospects and have become hot materials in recent years. This review comprehensively provides an overview of the latest developments and covers key aspects of HEO MNMs, by discussing design principles, computer-aided structural design, synthesis challenges and strategies, as well as application areas. The analysis of the synthesis process includes the role of high-throughput process in large-scale synthesis of HEOs MNMs, along with the effects of temperature elevation and undercooling on the formation of HEO MNMs. Additionally, the article summarizes the application of high-precision and in situ characterization devices in the field of HEO MNMs, offering robust support for related research. Finally, a brief introduction to the main applications of HEO MNMs is provided, emphasizing their key performances. This review offers valuable guidance for future research on HEO MNMs, outlining critical issues and challenges in the current field.
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Affiliation(s)
- Liang Zhang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Jiru Jia
- School of Textile Garment and Design, Changshu Institute of Technology, Suzhou, Jiangsu Province, 215500, China
| | - Jianhua Yan
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
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35
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Liu Y, Tuo P, Dai FZ, Yu Z, Lai W, Ding Q, Yan P, Gao J, Hu Y, Hu Y, Fan Y, Jiang W. A Highly Deficient Medium-Entropy Perovskite Ceramic for Electromagnetic Interference Shielding under Harsh Environment. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2400059. [PMID: 38684087 DOI: 10.1002/adma.202400059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 04/02/2024] [Indexed: 05/02/2024]
Abstract
Materials that can provide reliable electromagnetic interference (EMI) shielding in highly oxidative atmosphere at elevated temperature are indispensable in the fast-developing aerospace field. However, most of conductor-type EMI shielding materials such as metals can hardly withstand the high-temperature oxidation, while the conventional dielectric-type materials cannot offer sufficient shielding efficiency in gigahertz (GHz) frequencies. Here, a highly deficient medium-entropy (ME) perovskite ceramic as an efficient EMI shielding material in harsh environment, is demonstrated. The synergistic effect of entropy stabilization and aliovalent substitution on A-site generate abnormally high concentration of Ti and O vacancies that are stable under high-temperature oxidation. Due to the clustering of vacancies, the highly deficient perovskite ceramic exhibits giant complex permittivity and polarization loss in GHz, leading to the specific EMI shielding effectiveness above 30 dB/mm in X-band even after 100 h of annealing at 1000 °C in air. Along with the low thermal conductivity, the aliovalent ME perovskite can serve as a bifunctional shielding material for applications in aircraft engines and reusable rockets.
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Affiliation(s)
- Yongping Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Ping Tuo
- AI for Science Institute, Beijing, 100080, China
| | - Fu-Zhi Dai
- AI for Science Institute, Beijing, 100080, China
| | - Zhiyang Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
| | - Wei Lai
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
| | - Qi Ding
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Peng Yan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Jie Gao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Yunfeng Hu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Yixuan Hu
- Material Science and Engineering School, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yuchi Fan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Wan Jiang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
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36
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Wang X, Wang Z, Xi D, Li J, Li X, Bai X, Wang B, Low J, Xiong Y. Tunable Impedance of Cobalt Loaded Carbon for Wide-Range Electromagnetic Wave Absorption. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308970. [PMID: 38155111 DOI: 10.1002/smll.202308970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/03/2023] [Indexed: 12/30/2023]
Abstract
Impedance matching modulation of the electromagnetic wave (EMW) absorbers toward broad effective absorption bandwidth (EAB) is the ultimate aim in EMW attenuation applications. Here, a Joule heating strategy is reported for preparation of the Co-loaded carbon (Co/C) absorber with tunable impedance characteristics. Typically, the size of the Co can be regulated to range from single-atoms to clusters, and to nanocrystals. The varied sizes of the Co combined with different graphitization degrees of carbon can result in different relative input impedances and electromagnetic loss, leading to the tunable EMW absorption properties of the Co/C absorber. By meticulously coalescing the different prepared Co/C, the working frequency can be easily tuned, covering Ku, X, and C bands. Furthermore, the Co/C demonstrates a high EMW attenuation due to its unique dielectric loss capability and magnetic loss characteristics. The abundant interfaces of Co/C can also contribute to the enhanced interfacial polarization for improving EMW attenuation. This work demonstrates the importance of optimizing the metal and carbon interaction to the impedance matching toward wide EAB of the EMW absorbers.
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Affiliation(s)
- Xiaonong Wang
- College of Electronic Engineering, National University of Defense Technology, Hefei, Anhui, 230037, P. R. China
| | - Zhongliao Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, Huaibei Normal University, Huaibei, Anhui, 235000, P. R. China
| | - Dawei Xi
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Jiayi Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xiaoxia Li
- College of Electronic Engineering, National University of Defense Technology, Hefei, Anhui, 230037, P. R. China
| | - Xiujun Bai
- College of Electronic Engineering, National University of Defense Technology, Hefei, Anhui, 230037, P. R. China
| | - Bin Wang
- College of Electronic Engineering, National University of Defense Technology, Hefei, Anhui, 230037, P. R. China
| | - Jingxiang Low
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yujie Xiong
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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37
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Chen G, Zhang R, Yuan M, Xue S, Liu Y, Li B, Luo K, Lai Y, Zhang J, Lv H, Che R. Visualizing Nanoscale Interlayer Magnetic Interactions and Unconventional Low-Frequency Behaviors in Ferromagnetic Multishelled Structures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2313411. [PMID: 38469974 DOI: 10.1002/adma.202313411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 02/28/2024] [Indexed: 03/13/2024]
Abstract
Precise manipulation of van der Waals forces within 2D atomic layers allows for exact control over electron-phonon coupling, leading to the exceptional quantum properties. However, applying this technique to diverse structures such as 3D materials is challenging. Therefore, investigating new hierarchical structures and different interlayer forces is crucial for overcoming these limitations and discovering novel physical properties. In this work, a multishelled ferromagnetic material with controllable shell numbers is developed. By strategically regulating the magnetic interactions between these shells, the magnetic properties of each shell are fine-tuned. This approach reveals distinctive magnetic characteristics including regulated magnetic domain configurations and enhanced effective fields. The nanoscale magnetic interactions between the shells are observed and analyzed, which shed light on the modified magnetic properties of each shell, enhancing the understanding and control of ferromagnetic materials. The distinctive magnetic interaction significantly boosts electromagnetic absorption at low-frequency frequencies used by fifth-generation wireless devices, outperforming ferromagnetic materials without multilayer structures by several folds. The application of magnetic interactions in materials science reveals thrilling prospects for technological and electronic innovation.
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Affiliation(s)
- Guanyu Chen
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering and Technology, Fudan University, Shanghai, 200438, P. R. China
| | - Ruixuan Zhang
- Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, 200433, China
- Zhejiang Laboratory, Hangzhou, 311100, P. R. China
| | - Mingyue Yuan
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering and Technology, Fudan University, Shanghai, 200438, P. R. China
| | - Shuyan Xue
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering and Technology, Fudan University, Shanghai, 200438, P. R. China
| | - Yihao Liu
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering and Technology, Fudan University, Shanghai, 200438, P. R. China
| | - Bangxin Li
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering and Technology, Fudan University, Shanghai, 200438, P. R. China
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China
| | - Kaicheng Luo
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering and Technology, Fudan University, Shanghai, 200438, P. R. China
| | - Yuxiang Lai
- Pico Electron Microscopy Center, Innovation Institute for Ocean Materials Characterization, Center for Advanced Studies in Precision Instruments, Hainan University, Haikou, 570228, China
| | | | - Hualiang Lv
- Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, 200433, China
| | - Renchao Che
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering and Technology, Fudan University, Shanghai, 200438, P. R. China
- Zhejiang Laboratory, Hangzhou, 311100, P. R. China
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38
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Wang Y, Li X, Luo J, Woodfield BF, Wang X, Feng T, Yin N, Shi Q, Li G, Li L. An Unexpected Decrease in Vibrational Entropy of Multicomponent Rutile Oxides. J Am Chem Soc 2024; 146:14493-14504. [PMID: 38743872 DOI: 10.1021/jacs.3c14801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
High-entropy oxides (HEOs), featuring infinite chemical composition and exceptional physicochemical properties, are attracting much attention. The configurational entropy caused by a component disorder of HEOs is popularly believed to be the main driving force for thermal stability, while the role of vibrational entropy in the thermodynamic landscape has been neglected. In this study, we systematically investigated the vibrational entropy of multicomponent rutile oxides (including Fe0.5Ta0.5O2, Fe0.333Ti0.333Ta0.333O2, Fe0.25Ti0.25Ta0.25Sn0.25O2, and Fe0.21Ti0.21Ta0.21Sn0.21Ge0.16O2) by precise heat capacity measurements. It is found that vibrational entropy gradually decreases with increasing component disorder, beyond what one could expect from an equilibrium thermodynamics perspective. Moreover, all multicomponent rutile oxides exhibit a positive excess vibrational entropy at 298.15 K. Upon examinations of configuration disorder, size mismatch, phase transition, and polyhedral distortions, we demonstrate that the excess vibrational entropy plays a pivotal role in lowering the crystallization temperature of multicomponent rutile oxides. These findings represent the first experimental confirmation of the role of lattice vibrations in the thermodynamic landscape of rutile HEOs. In particular, vibrational entropy could serve as a novel descriptor to guide the predictive design of multicomponent oxide materials.
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Affiliation(s)
- Yaowen Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Xinbo Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Jipeng Luo
- Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Brian F Woodfield
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Xiyang Wang
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Tao Feng
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Nan Yin
- Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Quan Shi
- Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Guangshe Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Liping Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
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39
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Guo Z, Chen J, Chu S, Zhou W, Xie J. Microstructure regulation and microwave absorption properties of ZnO/RGO composites. Phys Chem Chem Phys 2024; 26:11968-11979. [PMID: 38573242 DOI: 10.1039/d3cp06282a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Electromagnetic waves can cause different degrees of damage to the human body. People are developing unique nanomaterials with excellent reflection loss (RL), thin thickness, wide frequency band and light weight to improve the absorption efficiency of electromagnetic waves. Using a hydrothermal method, ZnO nanocrystals are combined with graphene oxide (GO). After heat treatment, evenly dispersed ZnO nanocrystals are attached to the GO surface or inserted into the lamellae, and the amount of Zn(CH3COO)2·2H2O and GO is selected to obtain ZnO/RGO nanocomposites with different mass ratios (1 : 1, 1 : 2, 1 : 3). The ZnO/RGO nanocomposites were mixed with paraffin wax with different mass ratios (15, 20, 25, 30 wt%) to explore their electromagnetic parameters and wave absorption properties. It is found that at 25 wt%, ZnO : GO = 3 : 1 and thickness of 3 mm, the sample exhibits excellent wave absorption performance (-36.6 dB) and wide effective absorption bandwidth (6.6 GHz). The microwave absorption performance is enhanced because ZnO nanocrystals inhibit RGO agglomeration and improve impedance matching between the heterostructure interface and RGO.
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Affiliation(s)
- Zhifeng Guo
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
| | - Jin Chen
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
| | - Suihong Chu
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
| | - Wenwen Zhou
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
| | - Jiaqiang Xie
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
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40
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Cai B, Zhou L, Zhao PY, Peng HL, Hou ZL, Hu P, Liu LM, Wang GS. Interface-induced dual-pinning mechanism enhances low-frequency electromagnetic wave loss. Nat Commun 2024; 15:3299. [PMID: 38632245 PMCID: PMC11024160 DOI: 10.1038/s41467-024-47537-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 03/27/2024] [Indexed: 04/19/2024] Open
Abstract
Improving the absorption of electromagnetic waves at low-frequency bands (2-8 GHz) is crucial for the increasing electromagnetic (EM) pollution brought about by the innovation of the fifth generation (5G) communication technology. However, the poor impedance matching and intrinsic attenuation of material in low-frequency bands hinders the development of low-frequency electromagnetic wave absorbing (EMWA) materials. Here we propose an interface-induced dual-pinning mechanism and establish a magnetoelectric bias interface by constructing bilayer core-shell structures of NiFe2O4 (NFO)@BiFeO3 (BFO)@polypyrrole (PPy). Such heterogeneous interface could induce distinct magnetic pinning of the magnetic moment in the ferromagnetic NFO and dielectric pinning of the dipole rotation in PPy. The establishment of the dual-pinning effect resulted in optimized impedance and enhanced attenuation at low-frequency bands, leading to better EMWA performance. The minimum reflection loss (RLmin) at thickness of 4.43 mm reaches -65.30 dB (the optimal absorption efficiency of 99.99997%), and the effective absorption bandwidth (EAB) can almost cover C-band (4.72 ~ 7.04 GHz) with low filling of 15.0 wt.%. This work proposes a mechanism to optimize low-frequency impedance matching with electromagnetic wave (EMW) loss and pave an avenue for the research of high-performance low-frequency absorbers.
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Affiliation(s)
- Bo Cai
- School of Chemistry, Beihang University, Beijing, 100191, China
| | - Lu Zhou
- School of Chemistry, Beihang University, Beijing, 100191, China
| | - Pei-Yan Zhao
- School of Chemistry, Beihang University, Beijing, 100191, China
| | - Hua-Long Peng
- School of Chemistry, Beihang University, Beijing, 100191, China
| | - Zhi-Ling Hou
- College of Mathematics and Physics & Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Pengfei Hu
- Research Institute of Aero-Engine, Beihang University, Beijing, 100191, China.
| | - Li-Min Liu
- School of Physics, Beihang University, Beijing, 100191, China.
| | - Guang-Sheng Wang
- School of Chemistry, Beihang University, Beijing, 100191, China.
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41
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Mai T, Chen L, Wang PL, Liu Q, Ma MG. Hollow Metal-Organic Framework/MXene/Nanocellulose Composite Films for Giga/Terahertz Electromagnetic Shielding and Photothermal Conversion. NANO-MICRO LETTERS 2024; 16:169. [PMID: 38587615 PMCID: PMC11001847 DOI: 10.1007/s40820-024-01386-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 02/24/2024] [Indexed: 04/09/2024]
Abstract
With the continuous advancement of communication technology, the escalating demand for electromagnetic shielding interference (EMI) materials with multifunctional and wideband EMI performance has become urgent. Controlling the electrical and magnetic components and designing the EMI material structure have attracted extensive interest, but remain a huge challenge. Herein, we reported the alternating electromagnetic structure composite films composed of hollow metal-organic frameworks/layered MXene/nanocellulose (HMN) by alternating vacuum-assisted filtration process. The HMN composite films exhibit excellent EMI shielding effectiveness performance in the GHz frequency (66.8 dB at Ka-band) and THz frequency (114.6 dB at 0.1-4.0 THz). Besides, the HMN composite films also exhibit a high reflection loss of 39.7 dB at 0.7 THz with an effective absorption bandwidth up to 2.1 THz. Moreover, HMN composite films show remarkable photothermal conversion performance, which can reach 104.6 °C under 2.0 Sun and 235.4 °C under 0.8 W cm-2, respectively. The unique micro- and macro-structural design structures will absorb more incident electromagnetic waves via interfacial polarization/multiple scattering and produce more heat energy via the local surface plasmon resonance effect. These features make the HMN composite film a promising candidate for advanced EMI devices for future 6G communication and the protection of electronic equipment in cold environments.
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Affiliation(s)
- Tian Mai
- Research Center of Biomass Clean Utilization, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Lei Chen
- Research Center of Biomass Clean Utilization, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Pei-Lin Wang
- Research Center of Biomass Clean Utilization, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Qi Liu
- Research Center of Biomass Clean Utilization, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Ming-Guo Ma
- Research Center of Biomass Clean Utilization, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, People's Republic of China.
- State Silica-Based Materials Laboratory of Anhui Province, Bengbu, 233000, People's Republic of China.
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42
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Gai L, Wang Y, Wan P, Yu S, Chen Y, Han X, Xu P, Du Y. Compositional and Hollow Engineering of Silicon Carbide/Carbon Microspheres as High-Performance Microwave Absorbing Materials with Good Environmental Tolerance. NANO-MICRO LETTERS 2024; 16:167. [PMID: 38564086 PMCID: PMC10987424 DOI: 10.1007/s40820-024-01369-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 01/24/2024] [Indexed: 04/04/2024]
Abstract
Microwave absorbing materials (MAMs) characterized by high absorption efficiency and good environmental tolerance are highly desirable in practical applications. Both silicon carbide and carbon are considered as stable MAMs under some rigorous conditions, while their composites still fail to produce satisfactory microwave absorption performance regardless of the improvements as compared with the individuals. Herein, we have successfully implemented compositional and structural engineering to fabricate hollow SiC/C microspheres with controllable composition. The simultaneous modulation on dielectric properties and impedance matching can be easily achieved as the change in the composition of these composites. The formation of hollow structure not only favors lightweight feature, but also generates considerable contribution to microwave attenuation capacity. With the synergistic effect of composition and structure, the optimized SiC/C composite exhibits excellent performance, whose the strongest reflection loss intensity and broadest effective absorption reach - 60.8 dB and 5.1 GHz, respectively, and its microwave absorption properties are actually superior to those of most SiC/C composites in previous studies. In addition, the stability tests of microwave absorption capacity after exposure to harsh conditions and Radar Cross Section simulation data demonstrate that hollow SiC/C microspheres from compositional and structural optimization have a bright prospect in practical applications.
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Affiliation(s)
- Lixue Gai
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, People's Republic of China
| | - Yahui Wang
- Anhui Provincial Laboratory of Advanced Laser Technology, College of Electronic Engineering, National University of Defense Technology, Hefei, 230037, People's Republic of China.
| | - Pan Wan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, People's Republic of China
| | - Shuping Yu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, People's Republic of China
| | - Yongzheng Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, People's Republic of China
| | - Xijiang Han
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, People's Republic of China
| | - Ping Xu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, People's Republic of China
| | - Yunchen Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, People's Republic of China.
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43
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Yang S, Lin Z, Wang X, Huang J, Yang R, Chen Z, Jia Y, Zeng Z, Cao Z, Zhu H, Hu Y, Li E, Chen H, Wang T, Deng S, Gui X. Stretchable, Transparent, and Ultra-Broadband Terahertz Shielding Thin Films Based on Wrinkled MXene Architectures. NANO-MICRO LETTERS 2024; 16:165. [PMID: 38564038 PMCID: PMC10987438 DOI: 10.1007/s40820-024-01365-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 01/19/2024] [Indexed: 04/04/2024]
Abstract
With the increasing demand for terahertz (THz) technology in security inspection, medical imaging, and flexible electronics, there is a significant need for stretchable and transparent THz electromagnetic interference (EMI) shielding materials. Existing EMI shielding materials, like opaque metals and carbon-based films, face challenges in achieving both high transparency and high shielding efficiency (SE). Here, a wrinkled structure strategy was proposed to construct ultra-thin, stretchable, and transparent terahertz shielding MXene films, which possesses both isotropous wrinkles (height about 50 nm) and periodic wrinkles (height about 500 nm). Compared to flat film, the wrinkled MXene film (8 nm) demonstrates a remarkable 36.5% increase in SE within the THz band. The wrinkled MXene film exhibits an EMI SE of 21.1 dB at the thickness of 100 nm, and an average EMI SE/t of 700 dB μm-1 over the 0.1-10 THz. Theoretical calculations suggest that the wrinkled structure enhances the film's conductivity and surface plasmon resonances, resulting in an improved THz wave absorption. Additionally, the wrinkled structure enhances the MXene films' stretchability and stability. After bending and stretching (at 30% strain) cycles, the average THz transmittance of the wrinkled film is only 0.5% and 2.4%, respectively. The outstanding performances of the wrinkled MXene film make it a promising THz electromagnetic shielding materials for future smart windows and wearable electronics.
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Affiliation(s)
- Shaodian Yang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Zhiqiang Lin
- National Key Laboratory of Materials for Integrated Circuits, Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China
| | - Ximiao Wang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
- Guangdong Province Key Laboratory of Display Material and Technology, Guangzhou, 510275, People's Republic of China
| | - Junhua Huang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Rongliang Yang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Zibo Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Yi Jia
- China Academy of Aerospace Science and Innovation, Beijing, 100176, People's Republic of China
| | - Zhiping Zeng
- School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
| | - Zhaolong Cao
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
- Guangdong Province Key Laboratory of Display Material and Technology, Guangzhou, 510275, People's Republic of China
| | - Hongjia Zhu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China
- Guangdong Province Key Laboratory of Display Material and Technology, Guangzhou, 510275, People's Republic of China
| | - Yougen Hu
- National Key Laboratory of Materials for Integrated Circuits, Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China
| | - Enen Li
- GBA Branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou, 510700, People's Republic of China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
- Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics, Guangzhou, 510700, People's Republic of China
| | - Huanjun Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
- Guangdong Province Key Laboratory of Display Material and Technology, Guangzhou, 510275, People's Republic of China.
| | - Tianwu Wang
- GBA Branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou, 510700, People's Republic of China.
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
- Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics, Guangzhou, 510700, People's Republic of China.
| | - Shaozhi Deng
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
- Guangdong Province Key Laboratory of Display Material and Technology, Guangzhou, 510275, People's Republic of China.
| | - Xuchun Gui
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
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Kazmi SJ, Rehman SU, Nadeem M, Rehman UU, Hussain S, Manzoor S. Effect of carbon allotropes and thickness variation on the EMI shielding properties of PANI/NFO@CNTs and PANI/NFO@RGO ternary composite systems. Phys Chem Chem Phys 2024; 26:10168-10182. [PMID: 38495023 DOI: 10.1039/d4cp00028e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
The innovative design of thin, multiphase flexible composite systems with good mechanical properties, low density and improved EMI shielding properties at low filler content has become a key area of research. In this work, we report the low temperature synthesis of three-dimensional ternary composites (PANI/NFO@CNTs and PANI/NFO@RGO) by oxidative chemical polymerization of aniline in the presence of two different binary composites, viz. NFO@CNTs and NFO@RGO. Enhanced impedance matching is achieved by varying the ratio of the carbon allotropes (CNTs and RGO) to the ferrite component. The synthesis of NFO, PANI/NFO@CNTs and PANI/NFO@RGO is validated by XRD and FTIR spectroscopy. Field emission scanning electron microscopy (FE-SEM) confirmed the synthesis of core-shell structures of PANI/NFO@CNTs and PANI/NFO@RGO, where the binary composites (NFO@CNTs and NFO@RGO) serve as a core onto which a tubular PANI layer was coated. Shielding effectiveness of 22.36 dB (99.41% attenuation) is exhibited by the ternary composite PANI/NFO@CNTs (8 : 1), while for PANI/NFO@RGO (20 : 1) a total shielding effectiveness of 31 dB equivalent to 99.92% attenuation was observed at a thickness of 2 mm. The ternary composite PANI/NFO@RGO (20 : 1) 4 mm showed a maximum SET of 43 dB corresponding to 99.996% attenuation of incident EM waves. The enhanced EMI shielding properties of the synthesized ternary composite systems are accredited to good impedance matching, effective dielectric and magnetic loss mechanisms and good conductivity, which facilitate multiple reflections and scattering of incident radiation.
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Affiliation(s)
- Syeda Javaria Kazmi
- Magnetism Laboratory, Department of Physics, COMSATS University, 45550 Islamabad, Pakistan.
| | - Saeed Ur Rehman
- Magnetism Laboratory, Department of Physics, COMSATS University, 45550 Islamabad, Pakistan.
| | - M Nadeem
- Polymer Composite Group, Physics Division, Directorate of Science, PINSTECH, P.O. Nilore, Islamabad, Pakistan
| | - Ubaid Ur Rehman
- Polymer Composite Group, Physics Division, Directorate of Science, PINSTECH, P.O. Nilore, Islamabad, Pakistan
| | - Shahzad Hussain
- Magnetism Laboratory, Department of Physics, COMSATS University, 45550 Islamabad, Pakistan.
| | - Sadia Manzoor
- Magnetism Laboratory, Department of Physics, COMSATS University, 45550 Islamabad, Pakistan.
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45
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Wu L, Liu J, Liu X, Mou P, Lv H, Liu R, Wen J, Zhao J, Li J, Wang G. Microwave-Absorbing Foams with Adjustable Absorption Frequency and Structural Coloration. NANO LETTERS 2024; 24:3369-3377. [PMID: 38373202 DOI: 10.1021/acs.nanolett.3c05006] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Microwave-absorbing materials with regulatable absorption frequency and optical camouflage hold great significance in intelligent electronic devices and advanced stealth technology. Herein, we present an innovative microwave-absorbing foam that can dynamically tune microwave absorption frequencies via a simple mechanical compression while in parallel enabling optical camouflage over broad spectral ranges by adjusting the structural colors. The vivid colors spanning different color categories generated from thin-film interference can be precisely regulated by adjusting the thickness of the conformal TiO2 coatings on Ni/melamine foam. Enhanced interfacial and defect-induced polarizations resulting from the introduction of TiO2 coating synergistically contribute to the dielectric attenuation performance. Consequently, such a foam exhibits exceptional microwave absorption capabilities, and the absorption frequency can be dynamically tuned from the S band to the Ku band by manipulating its compression ratio. Additionally, simulation calculations validate the adjustable electromagnetic wave loss behavior, offering valuable insights for the development of next-generation intelligent electromagnetic devices across diverse fields.
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Affiliation(s)
- Lihong Wu
- Center for Advanced Studies in Precision Instruments, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China
- Key Laboratory of Pico Electron Microscopy of Hainan Province, Hainan University, Haikou, Hainan 570228, China
- Center for New Pharmaceutical Development and Testing of Haikou, Haikou, Hainan 570228, China
| | - Jun Liu
- Center for Advanced Studies in Precision Instruments, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China
| | - Xiao Liu
- Center for Advanced Studies in Precision Instruments, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China
| | - Pengpeng Mou
- Center for Advanced Studies in Precision Instruments, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China
| | - Haiming Lv
- Center for Advanced Studies in Precision Instruments, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China
| | - Rui Liu
- Center for Advanced Studies in Precision Instruments, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China
| | - Jianguo Wen
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Jinchuan Zhao
- Center for Advanced Studies in Precision Instruments, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China
- Key Laboratory of Pico Electron Microscopy of Hainan Province, Hainan University, Haikou, Hainan 570228, China
- Center for New Pharmaceutical Development and Testing of Haikou, Haikou, Hainan 570228, China
| | - Jianlin Li
- Center for Advanced Studies in Precision Instruments, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China
| | - Guizhen Wang
- Center for Advanced Studies in Precision Instruments, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China
- Key Laboratory of Pico Electron Microscopy of Hainan Province, Hainan University, Haikou, Hainan 570228, China
- Center for New Pharmaceutical Development and Testing of Haikou, Haikou, Hainan 570228, China
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46
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Zhang R, Fang X, Zhou B, Xiao C, Xie Y, Fan W, Liu Q, Fu X, Hu S, Wang J, Wong CP. Quasi-Hyperbolic Framework Graphite Foam-Based Composites with High Thermal Conductivity and Electromagnetic Shielding Properties Fabricated by an Electrochemical Expansion Method. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38489474 DOI: 10.1021/acsami.3c18502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/17/2024]
Abstract
Nowadays, the rapid development of electronic devices requires composites with high thermal conductivity and good electromagnetic shielding properties. The key challenge lies in the construction of high-performance conductive networks. Herein, an electrochemical expansion graphite foam (EEG) with a quasi-hyperbolic framework was prepared by an electrochemical expansion method, and then the epoxy resin (EP) was filled to fabricate the composites. The graphite plate was first electrochemically intercalated and then foamed, in which plasticization was caused by weak oxidation in intercalation and the quasi-hyperbolic framework was induced by foaming during expansion. These processes were characterized by Fourier transform infrared (FTIR), micro-Raman, X-ray photoelectron spectroscopy (XPS), and so on. Based on the highly efficient quasi-hyperbolic framework and high-quality graphite structure, the thermal conductivity of the composite reached 43.523 W/(m·K), and total electromagnetic interference (EMI) shielding (SET) reached 105 dB. The heat transfer behavior was simulated by finite element analysis (FEA) in detail. This method of preparing high thermal conductivity and electromagnetic shielding materials has a good application prospect.
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Affiliation(s)
- Rong Zhang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, Hubei, China
- Hubei Longzhong Laboratory, Xiangyang 441000, Hubei, China
- High-Tech Organic Fibers Key Laboratory of Sichuan Province, Sichuan Textile Scientific Research Institute Co., Ltd., Chengdu 610083, Sichuan, China
| | - Xiang Fang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, Hubei, China
| | - Baokuan Zhou
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, Hubei, China
| | - Chuzeyuan Xiao
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, Hubei, China
| | - Yutao Xie
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, Hubei, China
| | - Wuhou Fan
- High-Tech Organic Fibers Key Laboratory of Sichuan Province, Sichuan Textile Scientific Research Institute Co., Ltd., Chengdu 610083, Sichuan, China
| | - Qingting Liu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, Hubei, China
| | - Xudong Fu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, Hubei, China
| | - Shengfei Hu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, Hubei, China
| | - Juan Wang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, Hubei, China
| | - Ching Ping Wong
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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47
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Sun H, Wang Y, Liu Y, Wu R, Chang A, Zhao P, Zhang B. Enhanced Thermal Stability and Broad Temperature Range in High-Entropy (La 0.2Ce 0.2Nd 0.2Sm 0.2Eu 0.2)NbO 4 Ceramics. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38416064 DOI: 10.1021/acsami.4c00187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Next-generation high-temperature applications increasingly rely heavily on advanced thermistor materials with enhanced thermal stability and electrical performance. However, thus far, the great challenge of realizing high thermal stability and precision in a wide temperature range has become a key bottleneck restricting the high-temperature application. Here, we propose a high-entropy strategy to design novel high-temperature thermistor ceramics (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)NbO4. Differences in atomic size, mass, and electronegativity in this high-entropy system cause high lattice distortion, substantial grain boundaries, and high dislocation density. These enhance the charge carrier transport and reduce the grain boundary resistance, thus synergistically broadening the temperature range. Our samples maintain high precision and thermal stability over a wide temperature range from room temperature to 1523 K (ΔT = 1250 K) with an aging value as low as 0.42% after 1000 h at 1173 K, showing breakthrough progress in high-temperature thermistor ceramics. This study establishes an effective approach to enhancing the performance of high-temperature thermistor materials through high-entropy strategies.
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Affiliation(s)
- Hao Sun
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi 830011, China
| | - Yunfei Wang
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi 830011, China
| | - Yafei Liu
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi 830011, China
| | - Ruifeng Wu
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi 830011, China
| | - Aimin Chang
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi 830011, China
| | - Pengjun Zhao
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi 830011, China
| | - Bo Zhang
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi 830011, China
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48
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Kumar Singh S, Raj R, Salvi AS, Parasuram S, Kumar S, Bose S. Microwave-assisted ZnO-decorated carbon urchin resembling 'shish-kebab' morphology with self-healing and enhanced electromagnetic shielding properties. NANOSCALE 2024; 16:3510-3524. [PMID: 38265458 DOI: 10.1039/d3nr05758e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Herein, inspired by Acacia auriculiformis fruit, the shish-kebab-like growth of ZnO on carbon urchin (ZnO@CU) was designed using microwave radiation, thus leading to a hierarchal 3D structure that can promote multiple internal reflections through polarization centers. This hierarchal structure was then dispersed in a designer polyetherimide (PEI) matrix containing dynamic covalent bonds that can undergo metathesis, triggered by temperature, to harness self-healing properties in the composite. Such key attributes are required for their potential use in EMI shielding applications where frequent repairs are indispensable. Morphological investigation revealed that the ZnO flower was periodically nucleated like 'shish-kebab' structures on CU surfaces. CU was designed from short carbon fibers using a facile modified method. The EMI shielding performance of the resulting composites was investigated in the X-band, illustrating a shielding effectiveness of -40.6 dB for 2 wt% of ZnO@CU loading, and the composite can be preserved after the self-healing procedure. The ZnO 'kebabs' on 'CU shish' facilitated multiple scattering and numerous polarization centers to improve the EMI shielding performances at extremely low filler contents. In addition, the mechanical and thermal properties of the composite showed improved structural integrity and superior resistance to extreme temperatures, respectively. Overall, the proposed ZnO@CU/PEI composite has great potential to fulfill the increasing demands for lightweight EMI shielding materials in many fields.
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Affiliation(s)
- Sandeep Kumar Singh
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
| | - Rishi Raj
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
| | - Akshay Sunil Salvi
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
| | - Sampath Parasuram
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
| | - S Kumar
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
| | - Suryasarathi Bose
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
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49
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Hui S, Zhou X, Zhang L, Wu H. Constructing Multiphase-Induced Interfacial Polarization to Surpass Defect-Induced Polarization in Multielement Sulfide Absorbers. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2307649. [PMID: 38044282 PMCID: PMC10853738 DOI: 10.1002/advs.202307649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/01/2023] [Indexed: 12/05/2023]
Abstract
The extremely weak heterointerface construction of high-entropy materials (HEM) hinders them being the electromagnetic wave (EMW) absorbers with ideal properties. To address this issue, this study proposes multiphase interfacial engineering and results in a multiphase-induced interfacial polarization loss in multielement sulfides. Through the selection of atoms with diverse reaction activities, the multiphase interfacial components of CuS (1 0 5), Fe0.5 Ni0.5 S2 (2 1 0), and CuFe2 S3 (2 0 0) are constructed to enhance the interfacial polarization loss in multielement Cu-based sulfides. Compared with single-phase high-entropy Zn-based sulfides (ZnFeCoNiCr-S), the multiphase Cu-based sulfides (CuFeCoNiCr-S) possess optimized EMW absorption properties (effective absorption bandwidth (EAB) of 6.70 GHz at 2.00 mm) due to the existence of specific interface of CuS (1 0 5)/CuFe2 S3 (2 0 0) with proper EM parameters. Furthermore, single-phase ZnFeCoNiCr-S into FeNi2 S4 (3 1 1)/(Zn, Fe)S (1 1 1) heterointerface through 400 °C heat-treated is decomposed. The EMW absorption properties are enhanced by strong interfacial polarization (EAB of 4.83 GHz at 1.45 mm). This work reveals the reasons for the limited EMW absorption properties of high-entropy sulfides and proposes multiphase interface engineering to improve charge accumulation and polarization between specific interfaces, leading to the enhanced EMW absorption properties.
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Affiliation(s)
- Shengchong Hui
- MOE Key Laboratory of Material Physics and Chemistry under ExtraordinarySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi'an710072P. R. China
| | - Xu Zhou
- MOE Key Laboratory of Material Physics and Chemistry under ExtraordinarySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi'an710072P. R. China
| | - Limin Zhang
- MOE Key Laboratory of Material Physics and Chemistry under ExtraordinarySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi'an710072P. R. China
| | - Hongjing Wu
- MOE Key Laboratory of Material Physics and Chemistry under ExtraordinarySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi'an710072P. R. China
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50
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He Z, Xu H, Shi L, Ren X, Kong J, Liu P. Hierarchical Co 2 P/CoS 2 @C@MoS 2 Composites with Hollow Cavity and Multiple Phases Toward Wideband Electromagnetic Wave Absorption. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306253. [PMID: 37771205 DOI: 10.1002/smll.202306253] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/05/2023] [Indexed: 09/30/2023]
Abstract
The synergistic effect of hollow cavities and multiple hetero-interfaces displays huge advantages in achieving lightweight and high-efficient electromagnetic wave absorption, but still confronts huge challenges. Herein, hierarchical Co2 P/CoS2 @C@MoS2 composites via the self-sacrificed strategy and a subsequent hydrothermal method have been successfully synthesized. Specifically, ZIF-67 cores first act as the structural template to form core-shell ZIF-67@poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol) (ZIF-67@PZS) composites, which are converted into hollow Co2 P@C shells with micro-mesoporous characteristics because of the gradient structural stabilities and preferred coordination ability. The deposition of hierarchical MoS2 results in phase transition (Co2 P→Co2 P/CoS2 ), yielding the formation of hierarchical Co2 P/CoS2 @C@MoS2 composites with hollow cavities and multiple hetero-interfaces. Benefiting from the cooperative advantages of hollow structure, extra N,P,S-doped sources, lattice defects/vacancies, diverse incoherent interfaces, and hierarchical configurations, the composites deliver superior electromagnetic wave capability (-56.6 dB) and wideband absorption bandwidth (8.96 GHz) with 20 wt.% filler loading. This study provides a reliable and facile strategy for the precise construction of superior electromagnetic wave absorbents with efficient absorption attenuation.
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Affiliation(s)
- Zizhuang He
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, P. R. China
| | - Hanxiao Xu
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, P. R. China
| | - Lingzi Shi
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, P. R. China
| | - Xiangru Ren
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, P. R. China
| | - Jie Kong
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, P. R. China
| | - Panbo Liu
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, P. R. China
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