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Roy SS, Ghosh K, Meyyappan M, Giri PK. MXene Nanoribbon Aerogel-Based Gradient Conductivity Electromagnetic Interference Shields with Unprecedented Combination of High Green Index and Shielding Effectiveness. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2025:e2500003. [PMID: 39865927 DOI: 10.1002/smll.202500003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2025] [Indexed: 01/28/2025]
Abstract
The desire to reduce secondary pollution from shielded electronics devices demands electromagnetic interference (EMI) shields with high green index (GI), which is the ratio of absorbance over reflectance. Achieving high GI values simultaneously with high shielding effectiveness (SE) over 50 dB is a serious unresolved challenge. Reducing the impedance mismatch between the shield and free space is the key to reducing the reflection of incoming radiation and enabling more penetration into the body of the shield for absorption. Here a sandwich structure with gradient conductivity is introduced that achieves a combination of high GI (≈2) and SE (70 dB). The top layer deliberately uses an aerogel of low conductivity MXene nanoribbon in PEDOT:PSS polymer to boost the GI. The aerogel also reduces the permittivity of the shield, as another way to reduce the impedance mismatch for a nonmagnetic material. The bottom layer consists of a MXene nanosheet-polymer with its high metal-like conductivity to provide high SE. This successful demonstration is expected to lead to other novel ways to create conductivity gradient EMI shields.
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Affiliation(s)
- Sanjoy Sur Roy
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - Koushik Ghosh
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - M Meyyappan
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - P K Giri
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, India
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2
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Wang Y, Tang J, He M, Huang L, Wang X, Yu J. Optimization of Electromagnetic-Wave Reflectivity Performance of Electromagnetic Shielding Yarn Prepared by Evaporation-Induced Sintering of Ga 60.5In 25Sn 13Zn 1.5 Alloy with Nanosilicates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:24507-24515. [PMID: 39513352 DOI: 10.1021/acs.langmuir.4c03258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2024]
Abstract
Electromagnetic interference (EMI) shielding textiles have received widespread attention, and liquid metal (LM) shows superiority in flexible and deformable electronics. Here, we introduce a novel method using nanosilicates to help sinter LM through capillary evaporation, resulting in strong adhesion to substrates. By adjustment of the amount of nanosilicates, flexible EMI shielding yarns are created using dip-coating and curing processes. The sintered LM tightly adhered to the undulating and uneven surfaces of polyurethane (PU) yarns. The as-fabricated ION/LM@PU ("ION" is abbreviation of "ionogel") has strong EMI shielding and low EM-wave reflection due to the high electrical conductivity of the LM layer and good impedance matching of P(AAm-co-AA) ionogel. The addition of an ionogel enhances EM-wave absorption and strengthens interfacial polarization, making it an effective green EMI shielding yarn for reducing secondary reflection pollution. ION/LM@PU exhibited high total electromagnetic interference shielding effectiveness (EMI SET) (∼56 dB), low reflected power coefficient (R) (∼0.153), high impedance matching (|Zin/Z0| ≈ 0.660), high tensile strength (∼23.75 MPa), and high elastic recovery (∼0.92 at 10th stretch-release cycle). The EMI shielding mechanism of ION/LM@PU ± 60° is composed of reflective loss and absorption loss (including multireflective loss, conduction loss, dipole polarization loss, and interfacial polarization loss).
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Affiliation(s)
- Yichao Wang
- College of Textiles, Donghua University, Shanghai 201600, China
| | - Jingli Tang
- College of Textiles, Donghua University, Shanghai 201600, China
| | - Mengjuan He
- College of Textiles, Donghua University, Shanghai 201600, China
| | - Liqian Huang
- College of Textiles, Donghua University, Shanghai 201600, China
- Clothing and Design Faculty, Minjiang University, Fuzhou 350108, China
| | - Xueli Wang
- Textile Technology Innovation Center, Donghua University, Shanghai 201620, China
| | - Jianyong Yu
- Textile Technology Innovation Center, Donghua University, Shanghai 201620, China
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3
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Lu Y, Akhtar MN, Yousaf M, Katubi KM, Irfan M, Khan MA, Mahmoud M, Almohammedi A, Ullah S, Alrowaili Z, Al-Buriahi M. Structural, morphological, and EMI shielding evaluations of Sm-Mn co-doped Sr-based M-type hexaferrite for Ku band applications. JOURNAL OF ALLOYS AND COMPOUNDS 2024; 994:174627. [DOI: 10.1016/j.jallcom.2024.174627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2025]
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4
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Roy SS, Ghosh K, Meyyappan M, Giri PK. High green index electromagnetic interference shields with semiconducting Bi 2S 3 fillers in a PEDOT:PSS matrix. MATERIALS HORIZONS 2024; 11:3695-3705. [PMID: 38770582 DOI: 10.1039/d4mh00273c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Conventional metallic electromagnetic interference (EMI) shields, as well as the emerging 2D material-based shields, meet the shielding effectiveness (SE) needs of most applications. However, their shielding performance is dominated by the reflection of incoming radiation due to their high electrical conductivity, which leads to secondary pollution. This problem is getting exacerbated with the proliferation of electronics and communication networks in modern society. Thus, EMI shields that function dominantly by the absorption of incoming radiation are highly desirable. Such shields would be characterized by a green index, which is the ratio of absorbance over reflectance, close to or greater than one. For nonmagnetic materials, the best way to reduce the undesirable large impedance mismatch is to reduce the effective permittivity of the shield material. Here, we present a new EMI shield with a semiconductor Bi2S3 filler in a conducting PEDOT:PSS polymer matrix, instead of the conventional conductive fillers, to reduce the effective permittivity and demonstrate that even a light loading of only 10% Bi2S3 provides high SE of over 40 dB with a green index value of 0.75. Increasing the filler content to 15 wt% increases the green index close to unity while dropping the SE to 30 dB. The shielding mechanism is explained through electromagnetic parameter measurements and supplemented by density functional theory calculations. This work lays the foundation for the advancement of lightweight and ultrathin green EMI shields with minimum secondary pollution.
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Affiliation(s)
- Sanjoy Sur Roy
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039, India.
| | - Koushik Ghosh
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039, India.
| | - M Meyyappan
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - P K Giri
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039, India.
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, India
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5
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Han Z, Niu Y, Shi X, Pan D, Liu H, Qiu H, Chen W, Xu BB, El-Bahy ZM, Hou H, Elsharkawy ER, Amin MA, Liu C, Guo Z. MXene@c-MWCNT Adhesive Silica Nanofiber Membranes Enhancing Electromagnetic Interference Shielding and Thermal Insulation Performance in Extreme Environments. NANO-MICRO LETTERS 2024; 16:195. [PMID: 38743205 PMCID: PMC11557810 DOI: 10.1007/s40820-024-01398-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 03/15/2024] [Indexed: 05/16/2024]
Abstract
A lightweight flexible thermally stable composite is fabricated by combining silica nanofiber membranes (SNM) with MXene@c-MWCNT hybrid film. The flexible SNM with outstanding thermal insulation are prepared from tetraethyl orthosilicate hydrolysis and condensation by electrospinning and high-temperature calcination; the MXene@c-MWCNTx:y films are prepared by vacuum filtration technology. In particular, the SNM and MXene@c-MWCNT6:4 as one unit layer (SMC1) are bonded together with 5 wt% polyvinyl alcohol (PVA) solution, which exhibits low thermal conductivity (0.066 W m-1 K-1) and good electromagnetic interference (EMI) shielding performance (average EMI SET, 37.8 dB). With the increase in functional unit layer, the overall thermal insulation performance of the whole composite film (SMCx) remains stable, and EMI shielding performance is greatly improved, especially for SMC3 with three unit layers, the average EMI SET is as high as 55.4 dB. In addition, the organic combination of rigid SNM and tough MXene@c-MWCNT6:4 makes SMCx exhibit good mechanical tensile strength. Importantly, SMCx exhibit stable EMI shielding and excellent thermal insulation even in extreme heat and cold environment. Therefore, this work provides a novel design idea and important reference value for EMI shielding and thermal insulation components used in extreme environmental protection equipment in the future.
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Affiliation(s)
- Ziyuan Han
- Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Yutao Niu
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, People's Republic of China
| | - Xuetao Shi
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Duo Pan
- Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China.
| | - Hu Liu
- Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China.
| | - Hua Qiu
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Weihua Chen
- Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Ben Bin Xu
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8, UK
| | - Zeinhom M El-Bahy
- Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, 11884, Cairo, Egypt
| | - Hua Hou
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8, UK
| | | | - Mohammed A Amin
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, 21944, Taif, Saudi Arabia
| | - Chuntai Liu
- Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Zhanhu Guo
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8, UK
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Wan J, Sun D, Li P, Huang J, Chen Z. Design and Analysis of a Textured Cu-Encapsulated Ni Tube for Low-Reflection Electromagnetic Interference Shielding Material. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:9244-9254. [PMID: 38639003 DOI: 10.1021/acs.langmuir.4c00677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
With the frequent increase and update of electromagnetic interference (EMI) shielding materials, a low-resolution material that can absorb most electromagnetic waves, thereby effectively reducing the secondary pollution, is urgently needed. However, the excellent performance, flexibility, and low cost of these methods are usually incompatible with current reports. To address the above dilemma, we reported a facile solution for fabricating a low-reflection and high-performance EMI shielding composite by means of electroless nickel plating (EP-Ni), electroless copper plating (EP-Cu), annealing, and coating with a polydimethylsiloxane (PDMS) polymer with the structure of a Ni@Cu tube encapsulated with PDMS. The results indicate that the active groups on vegetable wool can act as active sites for the absorption of the Pd catalyst, thereby catalyzing the reduction of Ni2+, Cu2+, and the subsequent deposition on the plant fiber surface. Notably, the Ni@Cu-encapsulated plant fibers decreased during annealing at 100 °C. According to the segregated network and synergistic effect of the porous structure, the as-fabricated EMI shielding material demonstrated high absorption and low reflection, in which the power coefficient of the T value was approximately 0.0001, the R value was about 0.1764 (a decrease of 27.5% compared that of EP-Ni cotton), and the A value was approximately 0.8235.
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Affiliation(s)
- Jiajia Wan
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei City 230601, China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou City 542899, China
| | - Di Sun
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei City 230601, China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou City 542899, China
| | - Peng Li
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou City 542899, China
| | - Junjun Huang
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei City 230601, China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou City 542899, China
| | - Zhenming Chen
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei City 230601, China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou City 542899, China
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7
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Cheng J, Jin Y, Zhao J, Jing Q, Gu B, Wei J, Yi S, Li M, Nie W, Qin Q, Zhang D, Zheng G, Che R. From VIB- to VB-Group Transition Metal Disulfides: Structure Engineering Modulation for Superior Electromagnetic Wave Absorption. NANO-MICRO LETTERS 2023; 16:29. [PMID: 37994956 PMCID: PMC10667208 DOI: 10.1007/s40820-023-01247-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/11/2023] [Indexed: 11/24/2023]
Abstract
The laminated transition metal disulfides (TMDs), which are well known as typical two-dimensional (2D) semiconductive materials, possess a unique layered structure, leading to their wide-spread applications in various fields, such as catalysis, energy storage, sensing, etc. In recent years, a lot of research work on TMDs based functional materials in the fields of electromagnetic wave absorption (EMA) has been carried out. Therefore, it is of great significance to elaborate the influence of TMDs on EMA in time to speed up the application. In this review, recent advances in the development of electromagnetic wave (EMW) absorbers based on TMDs, ranging from the VIB group to the VB group are summarized. Their compositions, microstructures, electronic properties, and synthesis methods are presented in detail. Particularly, the modulation of structure engineering from the aspects of heterostructures, defects, morphologies and phases are systematically summarized, focusing on optimizing impedance matching and increasing dielectric and magnetic losses in the EMA materials with tunable EMW absorption performance. Milestones as well as the challenges are also identified to guide the design of new TMDs based dielectric EMA materials with high performance.
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Affiliation(s)
- Junye Cheng
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China.
| | - Yongheng Jin
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People's Republic of China
| | - Jinghan Zhao
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China
| | - Qi Jing
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China
| | - Bailong Gu
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China
| | - Jialiang Wei
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China
| | - Shenghui Yi
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China
| | - Mingming Li
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China
| | - Wanli Nie
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China
| | - Qinghua Qin
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 517182, People's Republic of China.
| | - Deqing Zhang
- School of Materials Science and Engineering, Qiqihar University, Qiqihar, 161006, People's Republic of China
| | - Guangping Zheng
- Department of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China.
| | - Renchao Che
- Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, People's Republic of China.
- Zhejiang Laboratory, Hangzhou, 311100, People's Republic of China.
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8
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Deng Z, Jiang P, Wang Z, Xu L, Yu ZZ, Zhang HB. Scalable Production of Catecholamine-Densified MXene Coatings for Electromagnetic Shielding and Infrared Stealth. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2304278. [PMID: 37431209 DOI: 10.1002/smll.202304278] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/21/2023] [Indexed: 07/12/2023]
Abstract
Processing transition metal carbides/nitrides (MXenes) inks into large-area functional coatings expects promising potential for electromagnetic interference (EMI) shielding and infrared stealth. However, the coating performances, especially for scalable fabrication techniques, are greatly constrained by the flake size and stacking manner of MXene. Herein, the large-area production of highly densified and oriented MXene coatings is demonstrated by engineering interfacial interactions of small MXene flakes with catecholamine molecules. The catecholamine molecules can micro-crosslink MXene nanosheets, significantly improving the ink's rheological properties. It favors the shear-induced sheet arrangement and inhibition of structural defects in the blade coating process, making it possible to achieve high orientation and densification of MXene assembly by either large-area coating or patterned printing. Interestingly, the MXene/catecholamine coating exhibits high conductivity of up to 12 247 S cm-1 and ultrahigh specific EMI shielding effectiveness of 2.0 ×10 5 dB cm2 g-1 , obviously superior to most of the reported MXene materials. Furthermore, the regularly assembled structure also endows the MXene coatings with low infrared emissivities for infrared stealth applications. Therefore, MXene/catecholamine coatings with ultraefficient EMI shielding and low infrared emissivity prove the feasibility of applications in aerospace, military, and wearable devices.
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Affiliation(s)
- Zhiming Deng
- State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Peizhu Jiang
- State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
- Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zhenguo Wang
- State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Li Xu
- State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zhong-Zhen Yu
- State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
- Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Hao-Bin Zhang
- State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
- Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, China
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Kumari S, Dalal J, Kumar V, Kumar A, Ohlan A. Emerging Two-Dimensional Materials for Electromagnetic Interference Shielding Application. Int J Mol Sci 2023; 24:12267. [PMID: 37569645 PMCID: PMC10419163 DOI: 10.3390/ijms241512267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 07/18/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
Graphene is the first two-dimensional material that becomes the center material in various research areas of material science, chemistry, condensed matter, and engineering due to its advantageous properties, including larger specific area, lower density, outstanding electrical conductivity, and ease of processability. These properties attracted the attention of material researchers that resulted in a large number of publications on EMI shielding in a short time and play a central role in addressing the problems and challenges faced in this modern era of electronics by electromagnetic interference. After the popularity of graphene, the community of material researchers investigated other two-dimensional materials like MXenes, hexagonal boron nitride, black phosphorous, transition metal dichalcogenides, and layered double hydroxides, to additionally enhance the EMI shielding response of materials. The present article conscientiously reviews the current progress in EMI shielding materials in reference to two-dimensional materials and addresses the future challenges and research directions to achieve the goals.
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Affiliation(s)
- Suman Kumari
- Department of Physics, Chaudhary Ranbir Singh University, Jind 126102, India
| | - Jasvir Dalal
- Department of Physics, Chaudhary Ranbir Singh University, Jind 126102, India
| | - Vibhor Kumar
- School of Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Anand Kumar
- Department of Physics, Chaudhary Ranbir Singh University, Jind 126102, India
| | - Anil Ohlan
- Department of Physics, Maharishi Dayanand University, Rohtak 124001, India
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Chen H, Xu Z, Zhou Y, Zhang M, Feng S, Bu X, Zhang Z, He M. Controllable preparation of 2D carbon paper modified with flower-like WS 2 for efficient microwave absorption. Dalton Trans 2023; 52:3085-3096. [PMID: 36786669 DOI: 10.1039/d2dt03137j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
In the practical application of microwave absorbing materials, traditional powder materials need to be mixed with the matrix to fabricate composite coatings. However, the complex preparation process of composite coatings and the uneven dispersion of powders in the matrix limit their application. To solve these problems, two-dimensional (2D) F-WS2/CP composite films were prepared by using carbon paper (CP) as a dispersion matrix and loading flower-like WS2 on its surface through a simple hydrothermal method. The morphology and microwave absorption (MA) performance of the composite films are easily regulated by adjusting the amount of reaction precursors. The combination of WS2 and CP facilitates impedance matching and improves the electromagnetic wave attenuation performance based on the synergistic effect of different loss mechanisms including multiple reflections and scattering, interfacial polarization, dipolar polarization, and conduction loss. At a low filler content (5 wt%), the maximum reflection loss (RL) of the composite film is up to -50 dB (99.999% energy absorption) at 12.5 GHz with 2.8 mm thickness. Moreover, at a relatively thin 1.8 mm thickness, its maximum RL remains -35 dB (>99.9% energy absorption). The as-prepared composite film shows excellent MA properties at a thinner thickness and lower filling content, providing inspiration for the preparation of light weight and efficient 2D thin-film microwave absorbers in the future.
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Affiliation(s)
- Hao Chen
- Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an 710021, China.,Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
| | - Zhengjian Xu
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
| | - Yuming Zhou
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
| | - Meiyun Zhang
- Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an 710021, China
| | - Shuangjiang Feng
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
| | - Xiaohai Bu
- School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China
| | - Zewu Zhang
- School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China
| | - Man He
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
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11
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Orasugh JT, Ray SS. Functional and Structural Facts of Effective Electromagnetic Interference Shielding Materials: A Review. ACS OMEGA 2023; 8:8134-8158. [PMID: 36910979 PMCID: PMC9996633 DOI: 10.1021/acsomega.2c05815] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Electromagnetic interference (EMI) shielding effectiveness (SE) systems have received immense attention from researchers owing to the rapid development in electronics and telecommunications, which is an alarming matter in our modern society. This radiation can damage the performance of EM devices and may harmfully affect animal/human health. The harmonious utilization of magnetic alloys and conducting but nonmagnetic materials (such as carbon/graphene) is a practical approach toward EMI SE. This review is not exhaustive, although it is comprehensive and aimed at all materials for EMI SE especially graphene-based polymeric composites. It encompasses multifunctional and functional structural EMI shields. These materials comprise polymers, carbons, ceramics, metals, cement composites/nanocomposites, and hybrids. The accessibility of abundant categories of carbon-based materials in their microscale, nanoscale, and quantum forms as EMI shields as polymer-carbon, cement-carbon, ceramic-carbon, metal-carbon, and their hybrids, makes them receive much attention, as a result of their unique amalgamation of electrical, magnetic, dielectric, thermal, and/or mechanical properties. Herewith, we have discussed the principles of EMI shields along with their design and state of the art basis and material architecture along with the drawbacks in research on EMI shields.
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Affiliation(s)
- Jonathan Tersur Orasugh
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, 2028Johannesburg, South Africa
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology
Innovation Centre, Council for Scientific
and Industrial Research, Pretoria0001, South Africa
| | - Suprakas Sinha Ray
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, 2028Johannesburg, South Africa
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology
Innovation Centre, Council for Scientific
and Industrial Research, Pretoria0001, South Africa
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12
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Zhou C, Zhang K, Sun X, Zhao X, Zheng K, Mi J, Qing F, Wen Q, Li X. Porous Graphene Produced by Carbothermal Shock for Green Electromagnetic Interference Shielding in Both Microwave and Terahertz Bands. SMALL METHODS 2023; 7:e2201493. [PMID: 36642856 DOI: 10.1002/smtd.202201493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/05/2022] [Indexed: 06/17/2023]
Abstract
The prospect of graphene-based shielding materials in the form of fillers is limited by the cumbersome preparation of graphene. Herein, defect-tunable porous graphene prepared by carbothermal shock using low-value sucrose as a precursor is proposed as an effective shielding filler. The resultant porous graphene exhibits 32.5 dB shielding efficiency (SE) and 2.5-18 GHz effective bandwidth at a mass loading of 20 wt%, competing with the shielding performance of graphene fillers prepared by other methods. Particularly, defect-rich graphene synthesized by increasing voltage and prolonging time shows increased electromagnetic (EM) wave absorption, echoing the current concept of green shielding. In addition, the strategy of controlling the discharge conditions to improve the absorption by the shield is developed in the terahertz band. The average SE and reflection loss of the samples in the THz band (0.2-1.2 THz) exhibit 40.7 and 15.9 dB at filler loading of 5 wt%, respectively, achieving effective shielding and absorption of THz waves. This work paves a new way for low-cost preparation of graphene for EM interference shielding fillers. Meanwhile, it supplies a reference for the shielding research of the upcoming applications integrating multiple EM bands (such as sixth-generation based integrated sensing and communication).
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Affiliation(s)
- Congli Zhou
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 610054, Chengdu, China
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology ofChina, 610054, Chengdu, China
| | - Kun Zhang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 610054, Chengdu, China
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology ofChina, 610054, Chengdu, China
| | - Xiao Sun
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 610054, Chengdu, China
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, 610054, Chengdu, China
| | - Xingchuan Zhao
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 610054, Chengdu, China
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology ofChina, 610054, Chengdu, China
| | - Kaiwen Zheng
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 610054, Chengdu, China
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology ofChina, 610054, Chengdu, China
| | - Jiawei Mi
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, 518110, Shenzhen, China
| | - Fangzhu Qing
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 610054, Chengdu, China
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology ofChina, 610054, Chengdu, China
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, 518110, Shenzhen, China
| | - Qiye Wen
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 610054, Chengdu, China
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, 610054, Chengdu, China
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, 518110, Shenzhen, China
| | - Xuesong Li
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 610054, Chengdu, China
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology ofChina, 610054, Chengdu, China
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, 518110, Shenzhen, China
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13
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Manna K, Sen Gupta R, Bose S. A universal approach to 'host' carbon nanotubes on a charge triggered 'guest' interpenetrating polymer network for excellent 'green' electromagnetic interference shielding. NANOSCALE 2023; 15:1373-1391. [PMID: 36594198 DOI: 10.1039/d2nr05626g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The widespread use of miniaturized electronic gadgets today faces stiff reliability obstacles from factors like stray electromagnetic signals. The challenge is to design lightweight shielding materials that combine small volume and high-frequency operations to reliably reduce/eliminate electromagnetic interference. Herein, in the first of its kind, a sequential interpenetrating polymeric network (IPN) membrane was used to host a CNT construct through a stimuli-responsive trigger. The proposed construct besides being robust, sustainable, and scalable is a universal approach to fabricate a CNT construct where conventional strategies are not amenable. This approach of self-assembling counter-charged CNTs also maximizes the number of CNTs in the final construct, thereby greatly enhancing the shielding performance dominated by 90% absorption in a wide frequency band of 8.2-26.5 GHz. The IPN-CNT construct achieves specific shielding effectiveness in the range of ca. 1607-5715 dB cm2 g-1 by tuning the thickness of the CNT construct with an endearing green index (gs ≈ 1.8). The performance of such an ultra-thin, light-weight IPN-CNT construct remained unchanged when subjected to 10 000 bending cycles and on exposure to different chemical environments, indicating outstanding mechanical/chemical stability.
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Affiliation(s)
- Kunal Manna
- Department of Materials Engineering, Indian Institute of Science, Bangalore, India.
| | - Ria Sen Gupta
- Department of Materials Engineering, Indian Institute of Science, Bangalore, India.
| | - Suryasarathi Bose
- Department of Materials Engineering, Indian Institute of Science, Bangalore, India.
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14
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Sushmita K, Ghosh D, Nilawar S, Bose S. Absorption Dominated Directional Electromagnetic Interference Shielding through Asymmetry in a Multilayered Construct with an Exceptionally High Green Index. ACS APPLIED MATERIALS & INTERFACES 2022; 14:49140-49157. [PMID: 36279251 DOI: 10.1021/acsami.2c13704] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Fabricating green electromagnetic interference (EMI) shields is the need of the hour because strong secondary reflections in the vicinity of the shield adversely affect the environment and the reliability of the neighboring devices. To this end, the present work aims to maximize the absorption-based EMI shielding through a multilayered construct comprising a porous structure (pore size less than λ/5), a highly conducting entity, and a layer to match the impedance. The elements of this construct were positioned so that the incoming electromagnetic (EM) radiation interacts with the other layers of the construct before the conducting entity. This positioning of the layers in the construct offers a high green shielding index (gs) and low reflection coefficient (R ∼ 0.1) with an exceptionally high percent absorption (up to 99%). Polyurethane (PU) foams were fabricated using the salt-leaching technique and strategically positioned with carbon nanotube (CNT) papers and polycarbonate (PC)-based films to obtain symmetric and asymmetric constructs. These structures were then employed to gain mechanistic insight into the directional dependency of shielding performance, gs, and heat dissipation ability. Interestingly, maximum total shielding effectiveness (SET) of -52 dB (88% absorption @8.2 GHz) and specific shielding effectiveness/thickness (SSEt) of -373 dB/cm2g were achieved for a symmetric construct whereas, for the asymmetric construct, the SET and SSEt were -37 dB and -280 dB/cm2g, respectively, with an exceptionally high gs of 8.6, the highest reported so far. The asymmetricity in the construct led to directional dependence of the absorption component (% SEA, shielding effectiveness due to absorption) and heat dissipation, primarily governed by the electrical and thermal conductivity gradient, respectively. This study opens new avenues in this field and reports constructs with an exceptionally high green index.
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Affiliation(s)
- Kumari Sushmita
- Centre for Nanoscience and Engineering, Indian Institute of Science, Bangalore560012, India
| | - Debabrata Ghosh
- Department of Materials Engineering, Indian Institute of Science, Bangalore560012, India
| | - Sagar Nilawar
- Department of Materials Engineering, Indian Institute of Science, Bangalore560012, India
| | - Suryasarathi Bose
- Department of Materials Engineering, Indian Institute of Science, Bangalore560012, India
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15
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Vidyashree M, Sushmita K, Nagarajan P, Kokila M, Bose S. Mimicking ‘Sea-Urchin’ like Heirarchical Carbon Structures Self-assembled from Carbon fibers for Green EMI Shielding. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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16
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Cheng J, Li C, Xiong Y, Zhang H, Raza H, Ullah S, Wu J, Zheng G, Cao Q, Zhang D, Zheng Q, Che R. Recent Advances in Design Strategies and Multifunctionality of Flexible Electromagnetic Interference Shielding Materials. NANO-MICRO LETTERS 2022; 14:80. [PMID: 35333993 PMCID: PMC8956783 DOI: 10.1007/s40820-022-00823-7] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 02/09/2022] [Indexed: 05/05/2023]
Abstract
With rapid development of 5G communication technologies, electromagnetic interference (EMI) shielding for electronic devices has become an urgent demand in recent years, where the development of corresponding EMI shielding materials against detrimental electromagnetic radiation plays an essential role. Meanwhile, the EMI shielding materials with high flexibility and functional integrity are highly demanded for emerging shielding applications. Hitherto, a variety of flexible EMI shielding materials with lightweight and multifunctionalities have been developed. In this review, we not only introduce the recent development of flexible EMI shielding materials, but also elaborate the EMI shielding mechanisms and the index for "green EMI shielding" performance. In addition, the construction strategies for sophisticated multifunctionalities of flexible shielding materials are summarized. Finally, we propose several possible research directions for flexible EMI shielding materials in near future, which could be inspirational to the fast-growing next-generation flexible electronic devices with reliable and multipurpose protections as offered by EMI shielding materials.
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Affiliation(s)
- Junye Cheng
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, People's Republic of China
| | - Chuanbing Li
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, People's Republic of China
| | - Yingfei Xiong
- School of Materials Science and Engineering, Qiqihar University, Qiqihar, 161006, People's Republic of China
| | - Huibin Zhang
- 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
| | - Hassan Raza
- Department of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Sana Ullah
- Department of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Jinyi Wu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, People's Republic of China
| | - Guangping Zheng
- Department of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Qi Cao
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, People's Republic of China.
| | - Deqing Zhang
- School of Materials Science and Engineering, Qiqihar University, Qiqihar, 161006, People's Republic of China
| | - Qingbin Zheng
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, 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.
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17
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Li J, Liu X, Feng Y, Yin J. Recent progress in polymer/two-dimensional nanosheets composites with novel performances. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101505] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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18
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Wu C, Liu Z, Yuan Z, Wang Y, Xian G, Zhu Z, Xie N, Zhang H, Liu Y, Kong LB. Anchoring 1D nanochain-like Co 3O 4 on a 2D layered Ti 3C 2T x MXene with outstanding electromagnetic absorption. NEW J CHEM 2022. [DOI: 10.1039/d2nj02473j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
3D superstructure Ti3C2Tx/Co3O4 nanochain composites were synthesized through electrostatic self-assembly, in which 1D Co3O4 nanochains were anchored on a 2D layered Ti3C2Tx surface.
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Affiliation(s)
- Chongmei Wu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Zhenying Liu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
- State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, 232001, Anhui, China
| | - Ziqing Yuan
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Yan Wang
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Guiyang Xian
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Zhaolin Zhu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Nan Xie
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Hanxin Zhang
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Yin Liu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
- Anhui International Joint Research Center for Nano Carbon-Based Materials and Environmental Health, Anhui University of Science and Technology, Huainan, 232001, Anhui, China
- State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, 232001, Anhui, China
| | - Ling Bing Kong
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, Guangdong, China
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19
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Kim Y, Hyeong SK, Choi Y, Lee SK, Lee JH, Yu HK. Transparent and Flexible Electromagnetic Interference Shielding Film Using ITO Nanobranches by Internal Scattering. ACS APPLIED MATERIALS & INTERFACES 2021; 13:61413-61421. [PMID: 34910873 DOI: 10.1021/acsami.1c17967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A transparent and flexible film capable of shielding electromagnetic waves over a wide range of frequencies (X and Ku bands, 8-18 GHz) is prepared. The electromagnetic wave shielding film is fabricated using the excellent transmittance, electrical conductivity, and thermal stability of indium tin oxide (ITO), a representative transparent conductive oxide. The inherent mechanical brittleness of oxide ceramics is overcome by adopting a nanobranched structure. In addition, mechanical stability is maintained even after repeated bending experiments (200 000 times). The produced transparent and flexible shielding film is applied to practical GHz devices (Wi-Fi and LTE devices), and signal sensitivity is confirmed to decrease. Therefore, it can be widely applied to various transparent and flexible electronic devices.
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Affiliation(s)
- Youngho Kim
- Department of Materials Science and Engineering, Ajou University, Suwon16499, Republic of Korea
- Department of Energy Systems Research, Ajou University, Suwon16499, Republic of Korea
| | - Seok-Ki Hyeong
- Department of Materials Science and Engineering, Ajou University, Suwon16499, Republic of Korea
- Department of Energy Systems Research, Ajou University, Suwon16499, Republic of Korea
- Functional Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeonbuk-do 55324, Republic of Korea
| | - Yeunji Choi
- Department of Materials Science and Engineering, Ajou University, Suwon16499, Republic of Korea
| | - Seoung-Ki Lee
- School of Materials Science and Engineering, Pusan National University, 2, Busandaehak-ro-63-beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea
| | - Jae-Hyun Lee
- Department of Materials Science and Engineering, Ajou University, Suwon16499, Republic of Korea
- Department of Energy Systems Research, Ajou University, Suwon16499, Republic of Korea
| | - Hak Ki Yu
- Department of Materials Science and Engineering, Ajou University, Suwon16499, Republic of Korea
- Department of Energy Systems Research, Ajou University, Suwon16499, Republic of Korea
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20
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Al-Tahan MA, Dong Y, Shrshr AE, Liu X, Zhang R, Guan H, Kang X, Wei R, Zhang J. Enormous-sulfur-content cathode and excellent electrochemical performance of Li-S battery accouched by surface engineering of Ni-doped WS 2@rGO nanohybrid as a modified separator. J Colloid Interface Sci 2021; 609:235-248. [PMID: 34906909 DOI: 10.1016/j.jcis.2021.12.035] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 12/02/2021] [Accepted: 12/04/2021] [Indexed: 12/19/2022]
Abstract
The poor conductivity of sulfur, the lithium polysulfide's shuttle effect, and the lithium dendrite problem still impede the practical application of lithium-sulfur (Li-S) batteries. In this work, the ultrathin nickel-doped tungsten sulfide anchored on reduced graphene oxide (Ni-WS2@rGO) is developed as a new modified separator in the Li-S battery. The surface engineering of Ni-WS2@rGO could enhance the cell conductivity and afford abundant chemical anchoring sites for lithium polysulfides (LiPSs) adsorption, which is convinced by the high adsorption energy and the elongate SS bond given using density-functional theory (DFT) calculation. Concurrently, the Ni-WS2@rGO as a modified separator could effectively catalyze the conversion of LiPSs during the charging/discharging process. The Li-S cell with Ni-WS2@rGO modified separator achieves a high initial capacity of 1160.8 mA h g-1 at the current density of 0.2C with a high-sulfur-content cathode up to 80 wt%, and a retained capacity of 450.7 mA h g-1 over 500 cycles at 1C, showing an efficient preventing polysulfides shuttle to the anode while having no influence on Li+ ion transference across the decorating separator. The strategy adopted in this work would afford an effective pathway to construct an advanced functional separator for practical high-energy-density Li-S batteries.
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Affiliation(s)
- Mohammed A Al-Tahan
- College of Chemistry, Zhengzhou University, Henan, Zhengzhou 450001, China; Chemistry Department, Faculty of Science, Al-Azhar University, Assiut 71524, Egypt
| | - Yutao Dong
- College of Science, Henan Agricultural University, Henan, Zhengzhou 450002, China.
| | - Aml E Shrshr
- College of Chemistry, Zhengzhou University, Henan, Zhengzhou 450001, China
| | - Xiaobiao Liu
- College of Science, Henan Agricultural University, Henan, Zhengzhou 450002, China.
| | - Ran Zhang
- College of Chemistry, Zhengzhou University, Henan, Zhengzhou 450001, China
| | - Hui Guan
- College of Chemistry, Zhengzhou University, Henan, Zhengzhou 450001, China
| | - Xiyang Kang
- College of Chemistry, Zhengzhou University, Henan, Zhengzhou 450001, China
| | - Ruipeng Wei
- College of Chemistry, Zhengzhou University, Henan, Zhengzhou 450001, China
| | - Jianmin Zhang
- College of Chemistry, Zhengzhou University, Henan, Zhengzhou 450001, China.
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21
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Yang GY, Wang SZ, Sun HT, Yao XM, Li CB, Li YJ, Jiang JJ. Ultralight, Conductive Ti 3C 2T x MXene/PEDOT:PSS Hybrid Aerogels for Electromagnetic Interference Shielding Dominated by the Absorption Mechanism. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57521-57531. [PMID: 34793675 DOI: 10.1021/acsami.1c13303] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
MXene aerogels with a porous microstructure are a promising electromagnetic interference (EMI) shielding material due to its low density and excellent electrical conductivity, which has attracted widespread attention. Compared with traditional EMI shielding materials that rely on reflection as the primary mechanism, MXene aerogels with absorption as the dominant mechanism have greater potential for development as a novel EMI shielding material because of its ability to reduce environmental contamination from reflected electromagnetic (EM) waves from materials. In this study, a novel Ti3C2Tx MXene/PEDOT:PSS hybrid aerogel was presented by freeze-drying and thermal annealing using few-layered Ti3C2Tx MXene and the conductive polymer poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS). PEDOT:PSS not only improved the gelling ability of Ti3C2Tx but also successfully established a conductive bridge between MXene nanosheets. The experimental results demonstrated that the hybrid aerogel exhibited an obvious porous microstructure, which was beneficial for the multiple scattering of EM waves within the materials. The EMI shielding effectiveness and specific shielding effectiveness reached up to 59 dB and 10,841 dB·cm2·g-1, respectively, while the SER/SET ratio value was only 0.05, indicating superior wave absorption performance. Furthermore, the good impedance matching, due to the electrical conductance loss and polarization loss effect of the composites, plays a critical role in their excellent wave absorption and EMI shielding performance. Therefore, this work provides a practical approach for designing and fabricating lightweight absorption-dominated EMI shielding materials.
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Affiliation(s)
- Guo-Yu Yang
- Shaanxi Engineering Research Center for Digital Manufacturing Technology, Northwestern Polytechnical University, Xi'an 710072, P. R. China
| | - Shao-Zhe Wang
- Shaanxi Engineering Research Center for Digital Manufacturing Technology, Northwestern Polytechnical University, Xi'an 710072, P. R. China
| | - Hong-Tai Sun
- Shaanxi Engineering Research Center for Digital Manufacturing Technology, Northwestern Polytechnical University, Xi'an 710072, P. R. China
| | - Xu-Ming Yao
- Shaanxi Engineering Research Center for Digital Manufacturing Technology, Northwestern Polytechnical University, Xi'an 710072, P. R. China
| | - Chuan-Bing Li
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, P. R. China
| | - Yu-Jun Li
- Shaanxi Engineering Research Center for Digital Manufacturing Technology, Northwestern Polytechnical University, Xi'an 710072, P. R. China
| | - Jian-Jun Jiang
- Shaanxi Engineering Research Center for Digital Manufacturing Technology, Northwestern Polytechnical University, Xi'an 710072, P. R. China
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22
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Jiang Z, Zhao S, Chen L, Liu YH. Freestanding "core-shell" AgNWs/metallic hybrid mesh electrodes for a highly efficient transparent electromagnetic interference shielding film. OPTICS EXPRESS 2021; 29:18760-18768. [PMID: 34154125 DOI: 10.1364/oe.423369] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 05/23/2021] [Indexed: 06/13/2023]
Abstract
We fabricated the freestanding "core-shell" AgNWs/ Ni mesh electrodes by employing AgNWs solution onto the freestanding Ni-mesh. The combination of AgNWs and Ni mesh resulted in higher electrical conductivity, thereby enhancing the electromagnetic interference (EMI) shielding effectiveness (SE). The hybrid freestanding electrode created highly effective transparent and flexible EMI shielding films, featuring an ultrathin thickness (3 µm), the high optical transparency of 93% at 550 nm, and a SE of 41.5 dB in the X-band, which exceeds that of 30 dB for a freestanding Ni-mesh (94%). We showed that the hybrid freestanding AgNWs/Ni-mesh film is a promising high-performance transparent and flexible EMI shielding material that satisfies the requirements for optoelectronic devices.
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23
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Shayesteh Zeraati A, Mende Anjaneyalu A, Pawar SP, Abouelmagd A, Sundararaj U. Effect of secondary filler properties and geometry on the electrical, dielectric, and electromagnetic interference shielding properties of carbon nanotubes/polyvinylidene fluoride nanocomposites. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25591] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ali Shayesteh Zeraati
- Department of Chemical and Petroleum Engineering University of Calgary Calgary Canada
| | | | | | - Ahmed Abouelmagd
- Department of Chemical and Petroleum Engineering University of Calgary Calgary Canada
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Peymanfar R, Ghorbanian-Gezaforodi S. Preparation of graphite-like carbon nitride (g-C 3N 4)/NiCo 2S 4 nanocomposite toward salient microwave characteristics and evaluation of medium influence on its microwave features. NANOTECHNOLOGY 2020; 31:495202. [PMID: 32990262 DOI: 10.1088/1361-6528/abb2c0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this paper, NiCo2S4 sulphide spinel nanoparticles are prepared using a modified solvothermal route, after which the obtained siegenite nanoparticles are tailored on graphite-like carbon nitride (g-C3N4) nanosheets. The morphology of tailored nanostructures is accomplished via an ion exchange process. Interestingly, the g-C3N4 stick structures are fabricated based on an innovative approach. Moreover, interfacial polarizations at heterojunction interfaces, and medium effects on microwave characteristics are examined, using polystyrene (PS) and polyvinylidene fluoride (PVDF) as polymeric matrices. The specimens are characterized via Fourier transform infrared (FTIR), X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM) analyses. The optical performance of nanostructures is studied by means of diffuse reflection spectroscopy (DRS) analysis, and is suggestive of a narrow band gap for NiCo2S4 and NiCo2S4/g-C3N4 nanostructures. Finally, the material's microwave absorbing features are clarified using a vector network analyzer (VNA) instrument via a wave guide technique. The resulting significant microwave absorptions reveal that our g-C3N4/NiCo2S4/PVDF 40% nanocomposite exhibited seven notches of reflection loss (RL), more than 30 dB in its curve, at 1.75 mm in thickness, while its maximum RL was 59.39 dB at 13.07 GHz. Interestingly, this composite, in a mass fraction of 60%, illustrates an efficient bandwidth of 5.1 GHz (RL > 10 dB) at only 1 mm thickness. It is worth noting that the maximum RL of g-C3N4 stick structures/PVDF measures 74.53 dB at 14.86 GHz, with a broadband efficient bandwidth of 7.96 GHz (RL > 10 dB). More significantly, both g-C3N4/NiCo2S4/PVDF and NiCo2S4/PVDF demonstrated salient electromagnetic interference shielding effectiveness (SE) > 30 dB across both x- and ku-band frequencies.
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Affiliation(s)
- Reza Peymanfar
- Department of Chemical Engineering, Energy Institute of Higher Education, Saveh, Iran
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25
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Peymanfar R, Yektaei M, Javanshir S, Selseleh-Zakerin E. Regulating the energy band-gap, UV–Vis light absorption, electrical conductivity, microwave absorption, and electromagnetic shielding effectiveness by modulating doping agent. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122981] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mei X, Lu L, Xie Y, Yu YX, Tang Y, Teh KS. Preparation of Flexible Carbon Fiber Fabrics with Adjustable Surface Wettability for High-Efficiency Electromagnetic Interference Shielding. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49030-49041. [PMID: 33073568 DOI: 10.1021/acsami.0c08868] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In the 5G era, for portable electronics to operate at high performance and low power levels, the incorporation of superior electromagnetic interference (EMI) shielding materials within the packages is of critical importance. A desirable wearable EMI shielding material is one that is lightweight, structurally flexible, air-permeable, and able to self-clean. To this end, a bioinspired electroless silver plating strategy and a one-step electrodeposition method are utilized to prepare an EMI shielding fabric (CEF-NF/PDA/Ag/50-30) that possesses these desirable properties. Porous CEF-NF mats with a spatially distributed silver coating create efficient pathways for electron movement and enable a remarkable conductivity of 370 S mm-1. When tested within a frequency range of 8.2-12.4 GHz, this highly conductive fabric not only achieves an EMI shielding effectiveness (EMI SE of 101.27 dB at 5028 dB cm2 g-1) comparable to a very thin and light metal but also retains the unique properties of fabrics-being light, structurally flexible, and breathable. In addition, it exhibits a high contact angle (CA) of 156.4° with reversible surface wettability. After having been subjected to 1000 cycles of bending, the performance of the fabric only decreases minimally. This strategy potentially provides a novel way to design and manufacture an easily integrated EMI shielding fabric for flexible wearable devices.
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Affiliation(s)
- Xiaokang Mei
- School of Mechanical & Automotive Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Longsheng Lu
- School of Mechanical & Automotive Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Yingxi Xie
- School of Mechanical & Automotive Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Yu-Xiang Yu
- School of Chemistry and Chemical Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Yong Tang
- School of Mechanical & Automotive Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Kwok Siong Teh
- School of Engineering, San Francisco State University, San Francisco, California 94132, United States
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27
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Bai Y, Qin F, Lu Y. Multifunctional Electromagnetic Interference Shielding Ternary Alloy (Ni-W-P) Decorated Fabric with Wide-Operating-Range Joule Heating Performances. ACS APPLIED MATERIALS & INTERFACES 2020; 12:48016-48026. [PMID: 33043668 DOI: 10.1021/acsami.0c15134] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Flexible electromagnetic interference (EMI) shielding textiles with wide-operating-range Joule heating performances are urgently indispensable in the application of artificial intelligence, communication industry, and wearable electronics. Herein, a simple and cost-effective approach is proposed to construct multifunctional textiles by electroless depositing a nickel-tungsten-phosphorus (Ni-W-P) ternary alloy on a polyamide (PA) fabric. The resultant fabric with a thickness of ∼117 μm exhibits a favorable EMI shielding effectiveness (SE) of 43.6 dB within 2-12.5 GHz. Particularly, finite difference time domain (FDTD) simulation was introduced to investigate the effects of the PA fabric mesh number and Ni-W ratio on the EMI SE value, which was validated by experimental results. In addition, the conductive fabric demonstrates excellent heating efficiency (up to 140 °C under 2 V within 60 s), a wide operating range (from 40 to 140 °C), and simultaneously, satisfactory reproducibility by undergoing dozens of heating and cooling cycles. Notably, EMI SE of the multifunctional fabric remains unchanged even after a series of durability measurements including 180 °C heating, ultrasonication treatment, and repetitive peeling tests, respectively. Therefore, the prepared Ni-W-P coated PA fabric with prominent chemical stability and mechanical robustness endows enormous potential in multi-scene applications.
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Affiliation(s)
- Yu Bai
- Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, China
- Department of Materials Science, Fudan University, Shanghai 200433, China
- Graduate School of China Academy of Engineering Physics, Beijing 100085, China
| | - Feng Qin
- Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, China
- Key Laboratory of Science and Technology on Complex Electromagnetic Environment, China Academy of Engineering Physics, Mianyang 621900, China
| | - Yinxiang Lu
- Department of Materials Science, Fudan University, Shanghai 200433, China
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28
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Wang Y, Di X, Gao X, Wu X. Design of MOF-derived hierarchical Co@C@RGO composite with controllable heterogeneous interfaces as a high-efficiency microwave absorbent. NANOTECHNOLOGY 2020; 31:395710. [PMID: 32470960 DOI: 10.1088/1361-6528/ab97d1] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Carbon-based composites have triggered tremendous attention in the development of high-efficiency microwave absorbers, due to their compatibility, light weight, and high microwave absorption. However, fabricating carbon-based absorbers with a strong absorption ability in a broad frequency range is challenging. Hence, a facile strategy was used to produce Co@C derived from a zeolitic imidazolate framework (ZIF)@ graphene. The Co@C@RGO composite was obtained by annealing the ZIF67/GO nanocomposite precursor at 650 °C in a nitrogen atmosphere. Due to the magnetic loss induced by the Co particles, the dielectric loss generated by the carbon skeletons and graphene, and the interfacial polarization between the components, the hierarchical composite exhibits superior electromagnetic (EM) wave absorption properties. The optimal reflection loss (RL) of the Co@C@ RGO composite can be up to -67.5 dB at 2.6 mm, and the effective bandwidth (≥-10 dB) is 5.4 GHz (10-15.4 GHz) with a thickness of 2 mm at 20 wt% loading. The dipolar polarization caused by graphene, as well as enhanced impedance matching, synergistic effect and interfacial effect among the components, increase the microwave absorption performance of the composite. This work may open a new path to use the Co@C@RGO composite with its high-efficiency EM wave properties as an absorber.
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Affiliation(s)
- Yan Wang
- School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, People's Republic of China
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29
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Wang XX, Cao WQ, Cao MS, Yuan J. Assembling Nano-Microarchitecture for Electromagnetic Absorbers and Smart Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002112. [PMID: 32686195 DOI: 10.1002/adma.202002112] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/30/2020] [Indexed: 05/23/2023]
Abstract
Smart devices, nowadays, are inspiring the infinite vitality and possibilities of intelligent life, such as self-power electromagnetic (EM) nanogenerator and microsensor, smart window, thermally-driven EM absorber, interstellar energy deliverer, and so on. Herein, the latest and most impressive works of 3D nano-micro architectures and their smart EM devices are highly focused on. The most key information, including assembly strategy and mechanism, EM response, and approach-structure-function relationship, is extracted and well-organized with profundity and easy-to-understand approach. The merit and demerit are revealed by comparison. What's more, the brightest and most cutting-edge smart EM devices constructed by 3D nano-micro architectures are reported as highlights, and the device principles are deeply dissected. Finally, a profound and top comment on the fast-growing field as well as challenges are proposed, and the future directions are predicted intelligently.
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Affiliation(s)
- Xi-Xi Wang
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Wen-Qiang Cao
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Mao-Sheng Cao
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Jie Yuan
- School of Information Engineering, Minzu University of China, Beijing, 100081, China
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30
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Qi Q, Ma L, Zhao B, Wang S, Liu X, Lei Y, Park CB. An Effective Design Strategy for the Sandwich Structure of PVDF/GNP-Ni-CNT Composites with Remarkable Electromagnetic Interference Shielding Effectiveness. ACS APPLIED MATERIALS & INTERFACES 2020; 12:36568-36577. [PMID: 32686398 DOI: 10.1021/acsami.0c10600] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
It is well-known that attractive electromagnetic interference (EMI) shielding performance depends on functional (e.g., electrical and magnetic) fillers and structural designs. This paper presents a novel three-layered sandwich structure of poly(vinylidene fluoride) (PVDF)-based nanocomposites, consisting of graphene nanoplatelets (GNP), nickel (Ni), and carbon nanotubes (CNT). The unique three-layered sandwich structure of GNP-Ni-CNT exhibited excellent EMI shielding ability due to the several interfaces of the multilayered structure with electric loss by the conductive fillers and magnetic loss by the magnetic filler. The overall shielding performance could be further improved by increasing the overall thickness and the number of layers. With a fixed thickness of 0.6 mm, the shielding effectiveness of the PVDF/GNP-Ni-CNT three-layered and six-layered structure composite at 15 GHz was 41.8 and 46.4 dB, respectively. These results provide a useful strategy to prepare various EMI shielding materials with a sandwich structure, presenting tremendous opportunities to design and manufacture advanced EMI shielding materials and equipment.
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Affiliation(s)
- Qing Qi
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
- Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto M5S 3G8, Canada
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900 Sichuan, China
| | - Li Ma
- Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto M5S 3G8, Canada
| | - Biao Zhao
- Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto M5S 3G8, Canada
- School of Material Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, Henan 450046, China
| | - Sai Wang
- Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto M5S 3G8, Canada
| | - Xiaobo Liu
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Yajie Lei
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900 Sichuan, China
| | - Chul B Park
- Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto M5S 3G8, Canada
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Zhang D, Liu T, Zhang M, Zhang H, Yang X, Cheng J, Shu J, Li L, Cao M. Confinedly growing and tailoring of Co 3O 4 clusters-WS 2 nanosheets for highly efficient microwave absorption. NANOTECHNOLOGY 2020; 31:325703. [PMID: 32315995 DOI: 10.1088/1361-6528/ab8b8d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Electromagnetic (EM) wave absorbing materials have been a research hotspot in materials science and related technical fields in recent years. Finding lightweight, efficient, and broadband electromagnetic wave absorbing materials has always been a very challenging subject. Herein, we successfully prepared Co3O4-WS2 hybrid nanosheets with heterostructures, which excellent combine the advantages of magnetic property of Co3O4 and dielectric property of WS2. By the electromagnetic synergy effect, maximum RL is up to -61.1 dB at 1.9 mm, and the bandwidth exceeds 5 GHz. Such highly efficient microwave absorption is attributed to not only the electromagnetic synergy effect, but the dipole polarization as well as conduction loss. These results show that the obtained Co3O4-WS2 is an excellent EM wave absorbing material and can be used as a candidate for advanced EM wave absorbing materials in the fields such as commerce, military and aerospace in future.
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Affiliation(s)
- Deqing Zhang
- School of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, People's Republic of China
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32
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Sushmita K, Madras G, Bose S. Polymer Nanocomposites Containing Semiconductors as Advanced Materials for EMI Shielding. ACS OMEGA 2020; 5:4705-4718. [PMID: 32201755 PMCID: PMC7081317 DOI: 10.1021/acsomega.9b03641] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 02/25/2020] [Indexed: 05/21/2023]
Abstract
Miniaturization of electronic devices and systems enhances the complexity of inbuilt circuitry, thereby giving rise to electromagnetic interference (EMI). EMI is a serious cause of concern as it affects the performance of a device, transmission channel, or system. In a quest to find an effective solution to this problem, several materials, apart from the conventional metals, such as carbon derivatives, have been extensively explored recently. In addition to carbon derivatives, hybrid structures such as core-shell, conjugated systems, etc. have also been researched. However, semiconducting fillers have received less attention, especially in this application. Hence, this review article will primarily focus on the systematic understanding of the use of semiconductor-based polymer nanocomposites and how the band gap plays a crucial role in deciding the dielectric properties and subsequently the electromagnetic absorption behavior for shielding applications. Our primary aim is to highlight the mechanism of shielding involved in such nanocomposites in addition to discussing the synthesis and properties that lead to effective shielding. Such nanocomposites containing semiconductors can pave the way for alternate materials for EMI shielding applications that are lightweight, flexible, and easy to integrate.
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Affiliation(s)
- Kumari Sushmita
- Centre
for Nanoscience and Engineering, Indian
Institute of Science, Bangalore 560012, India
| | - Giridhar Madras
- Interdisciplinary
Centre for Energy Research, Indian Institute
of Science, Bangalore 560012, India
| | - Suryasarathi Bose
- Department
of Materials Engineering, Indian Institute
of Science, Bangalore 560012, India
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Synergetic dielectric loss and magnetic loss towards superior microwave absorption through hybridization of few-layer WS 2 nanosheets with NiO nanoparticles. Sci Bull (Beijing) 2020; 65:138-146. [PMID: 36659077 DOI: 10.1016/j.scib.2019.10.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/30/2019] [Accepted: 10/10/2019] [Indexed: 01/21/2023]
Abstract
WS2 nanomaterials have attracted great attention in the field of electromagnetic wave absorption due to their high specific surface area, layered structure, and peculiar electronic properties. However, further improvements on their limited electromagnetic absorbing (EMA) capacity and bandwidth are urgently required for their practical application as EMA absorbents. In this work, WS2/NiO hybrids with heterostructures are prepared by a hydrothermal method and developed into EMA absorbents. The maximum reflection loss of the hybrids with 20% NiO loading could reach -53.31 dB at a thickness of 4.30 mm; the bandwidth with a reflection loss value of less than -10 dB is determined to be 13.46 GHz (4.54-18 GHz) when the thickness of the absorbent is between 3.5 and 5.5 mm. It is found that the enhanced EMA performance of WS2/NiO hybrids is caused by the addition of magnetic NiO, which could result in the interfaces between WS2 and NiO being responsible for the synergetic magnetic loss and dielectric loss in the hybrids. This work provides a new approach for the design of excellent EMA materials for practical applications.
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34
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Vattikuti SVP, Nagajyothi PC, Devarayapalli KC, Shim J. Depositing reduced graphene oxide onto tungsten disulfide nanosheets via microwave irradiation: confirmation of four-electron transfer-assisted oxygen reduction and methanol oxidation reaction. NEW J CHEM 2020. [DOI: 10.1039/d0nj01097a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Core–shell structured rGO@WS2 nanostructures exhibited four electron transfer towards the ORR and remarkable methanol oxidation reaction.
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Affiliation(s)
| | | | | | - Jaesool Shim
- School of Mechanical Engineering
- Yeungnam University
- Gyeongsan-38541
- Republic of Korea
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