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Cao X, Zhou R, Xiong Y, Du G, Feng Z, Pan Q, Chen Y, Ji H, Ni Z, Lu J, Hu H, You Y. Volume-Confined Fabrication of Large-Scale Single-Crystalline Molecular Ferroelectric Thin Films and Their Applications in 2D Materials. Adv Sci (Weinh) 2024; 11:e2305016. [PMID: 38037482 PMCID: PMC10811469 DOI: 10.1002/advs.202305016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/23/2023] [Indexed: 12/02/2023]
Abstract
With outstanding advantages of chemical synthesis, structural diversity, and mechanical flexibility, molecular ferroelectrics have attracted increasing attention, demonstrating themselves as promising candidates for next-generation wearable electronics and flexible devices in the film form. However, it remains a challenge to grow high-quality thin films of molecular ferroelectrics. To address the above issue, a volume-confined method is utilized to achieve ultrasmooth single-crystal molecular ferroelectric thin films at the sub-centimeter scale, with the thickness controlled in the range of 100-1000 nm. More importantly, the preparation method is applicable to most molecular ferroelectrics and has no dependency on substrates, showing excellent reproducibility and universality. To demonstrate the application potential, two-dimensional (2D) transitional metal dichalcogenide semiconductor/molecular ferroelectric heterostructures are prepared and investigated by optical spectroscopic method, proving the possibility of integrating molecular ferroelectrics with 2D layered materials. These results may unlock the potential for preparing and developing high-performance devices based on molecular ferroelectric thin films.
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Affiliation(s)
- Xiao‐Xing Cao
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189People's Republic of China
| | - Ru‐Jie Zhou
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189People's Republic of China
| | - Yu‐An Xiong
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189People's Republic of China
| | - Guo‐Wei Du
- Key Laboratory of Quantum Materials and Devices of Ministry of EducationSchool of PhysicsSoutheast UniversityNanjing211189People's Republic of China
| | - Zi‐Jie Feng
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189People's Republic of China
| | - Qiang Pan
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189People's Republic of China
| | - Yin‐Zhu Chen
- Key Laboratory of Quantum Materials and Devices of Ministry of EducationSchool of PhysicsSoutheast UniversityNanjing211189People's Republic of China
| | - Hao‐Ran Ji
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189People's Republic of China
| | - Zhenhua Ni
- Key Laboratory of Quantum Materials and Devices of Ministry of EducationSchool of PhysicsSoutheast UniversityNanjing211189People's Republic of China
| | - Junpeng Lu
- Key Laboratory of Quantum Materials and Devices of Ministry of EducationSchool of PhysicsSoutheast UniversityNanjing211189People's Republic of China
| | - Huihui Hu
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189People's Republic of China
| | - Yu‐Meng You
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189People's Republic of China
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2
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Wang J, Liu Y, Li H, He R, Guo Y, Xu J, Yu Z, Liu X, Liu W, Liu Z, Zhu Y, Wang J. Progressively Oriented Attachment-Enabled Ultralong Single-Crystalline Upconversion Nanowires for Multidirectional Strain Sensing. ACS Nano 2023. [PMID: 37345640 DOI: 10.1021/acsnano.3c01070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/23/2023]
Abstract
Fabricating one-dimensional (1D) single-crystalline nanostructures with the necessary characteristics for interconnects and functional units in nanodevices poses a major challenge. Traditional solution-based synthesis methods, driven by oriented attachment mechanisms, have limited the growth of either ultrathin crystalline nanowires or short rod-like nanocrystals due to stringent orientation requirements. The construction of single-crystalline ultralong nanowires with both an elongated length and moderate thickness has remained elusive. Here we introduce a growth mechanism based on progressively oriented attachment that enables the attachment of larger crystals while preserving the alignment of the crystal lattice. Using this mechanism, we achieve 1D single-crystalline lanthanide-doped nanowires (K2YF5:Yb/Er) with lengths up to 9 μm and a moderate thickness of approximately 20 nm. These nanowires can be integrated into a flexible film that exhibits stretching-dependent upconverted luminescence behavior. The mechanical toughness and elongated morphology of the nanowires facilitate the development of a wearable device dedicated to multidirectional strain sensing with high responsivity and excellent stability, withstanding repeated stretching and releasing for up to 1000 cycles.
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Affiliation(s)
- Jiaying Wang
- Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environment and Resources Science, Zhejiang University, Hangzhou 310027, China
| | - Yikuan Liu
- Center for Electron Microscopy, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Institute for Frontier and Interdisciplinary Sciences, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hanfei Li
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, Shenzhen 518060, China
| | - Ruihua He
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Yang Guo
- Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environment and Resources Science, Zhejiang University, Hangzhou 310027, China
| | - Jiahui Xu
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Ziwei Yu
- Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environment and Resources Science, Zhejiang University, Hangzhou 310027, China
| | - Xiaogang Liu
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Weiping Liu
- Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environment and Resources Science, Zhejiang University, Hangzhou 310027, China
| | - Zhiyuan Liu
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, Shenzhen 518060, China
| | - Yihan Zhu
- Center for Electron Microscopy, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Institute for Frontier and Interdisciplinary Sciences, Zhejiang University of Technology, Hangzhou 310014, China
| | - Juan Wang
- Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environment and Resources Science, Zhejiang University, Hangzhou 310027, China
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Liu H, Li H, Tao J, Liu J, Yang J, Li J, Song J, Ren J, Wang M, Yang S, Song X, Wang Y. Single Crystalline Transparent Conducting F, Al, and Ga Co-Doped ZnO Thin Films with High Photoelectrical Performance. ACS Appl Mater Interfaces 2023; 15:22195-22203. [PMID: 37129068 DOI: 10.1021/acsami.2c22784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Transparent conductive film (TCF) is a material that integrates electrical conductivity and optical transparency. It is widely used as an electrode material in thin-film solar cells. However, considerable progress is needed to facilitate its high performance and low-cost preparation. In this study, a preparation scheme for AlF3 and GaF3 co-doped ZnO (FAGZO) thin films was designed and implemented by magnetron sputtering (MS). The mutual restraint between the electrical properties and the wide-spectrum transmission performance of ZnO films was resolved. First-principles calculations showed that the doped ZnO system had n-type conductivity and that the most stable structure was the FO-AlZn-GaZn system. The experimental results verified the theoretical predictions. Single crystalline ZnO transparent conducting films (ZnO-TCFs) of high quality were achieved by MS. After rapid thermal annealing (RTA) treatment, the mobility reached 49.6 cm2/V s, and the resistivity decreased to 3.82 × 10-4 Ω cm. The AT was 90% between 380 and 1200 nm. Furthermore, the application of the prepared FAGZO film in perovskite solar cells (PSCs) has been verified. Compared to the reference indium tin oxide film, the PSCs using the FAGZO film showed higher JSC and power conversion efficiency. These results demonstrate that MS combined with anion and cation co-doping provides an effective means of exploring high-quality and high-performance ZnO-TCFs.
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Affiliation(s)
- Haixu Liu
- College of Science, Hebei North University, Zhangjiakou 075000, China
| | - Hui Li
- School of Information Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Junlei Tao
- Province-Ministry Co-Construction Collaborative Innovation Center of Photovoltaic Technology of Hebei Province, Hebei University, Baoding 071002, China
| | - Jia Liu
- School of Information Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Jinzheng Yang
- College of Science, Hebei North University, Zhangjiakou 075000, China
| | - Junjie Li
- College of Science, Hebei North University, Zhangjiakou 075000, China
- Province-Ministry Co-Construction Collaborative Innovation Center of Photovoltaic Technology of Hebei Province, Hebei University, Baoding 071002, China
| | - Jianmin Song
- College of Sciences, Hebei Agriculture University, Baoding 071001, China
| | - Jie Ren
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Min Wang
- School of Information Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Shaopeng Yang
- Province-Ministry Co-Construction Collaborative Innovation Center of Photovoltaic Technology of Hebei Province, Hebei University, Baoding 071002, China
| | - Xin Song
- School of Materials Science and Engineering Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications Changzhou University, Changzhou 213164, China
| | - Yanfeng Wang
- College of Science, Hebei North University, Zhangjiakou 075000, China
- Province-Ministry Co-Construction Collaborative Innovation Center of Photovoltaic Technology of Hebei Province, Hebei University, Baoding 071002, China
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Walls B, Murtagh O, Bozhko SI, Ionov A, Mazilkin AA, Mullarkey D, Zhussupbekova A, Shulyatev DA, Zhussupbekov K, Andreev N, Tabachkova N, Shvets IV. VO x Phase Mixture of Reduced Single Crystalline V 2O 5: VO 2 Resistive Switching. Materials (Basel) 2022; 15:7652. [PMID: 36363246 PMCID: PMC9653758 DOI: 10.3390/ma15217652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/12/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
The strongly correlated electron material, vanadium dioxide (VO2), has seen considerable attention and research application in metal-oxide electronics due to its metal-to-insulator transition close to room temperature. Vacuum annealing a V2O5(010) single crystal results in Wadsley phases (VnO2n+1, n > 1) and VO2. The resistance changes by a factor of 20 at 342 K, corresponding to the metal-to-insulator phase transition of VO2. Macroscopic voltage-current measurements with a probe separation on the millimetre scale result in Joule heating-induced resistive switching at extremely low voltages of under a volt. This can reduce the hysteresis and facilitate low temperature operation of VO2 devices, of potential benefit for switching speed and device stability. This is correlated to the low resistance of the system at temperatures below the transition. High-resolution transmission electron microscopy measurements reveal a complex structural relationship between V2O5, VO2 and V6O13 crystallites. Percolation paths incorporating both VO2 and metallic V6O13 are revealed, which can reduce the resistance below the transition and result in exceptionally low voltage resistive switching.
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Affiliation(s)
- Brian Walls
- School of Physics and Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, D02PD91 Dublin, Ireland
| | - Oisín Murtagh
- School of Physics and Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, D02PD91 Dublin, Ireland
| | - Sergey I. Bozhko
- Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia
| | - Andrei Ionov
- Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia
- Faculty of Physics, Higher School of Economics University, Myasnitskaya Ulitsa, 20, 101000 Moscow, Russia
| | - Andrey A. Mazilkin
- Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia
| | - Daragh Mullarkey
- School of Physics and Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, D02PD91 Dublin, Ireland
| | - Ainur Zhussupbekova
- School of Physics and Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, D02PD91 Dublin, Ireland
| | - Dmitry A. Shulyatev
- Materials Modeling and Development Laboratory, National University of Science and Technology MISIS, Leninskii Pr. 4, 119991 Moscow, Russia
| | - Kuanysh Zhussupbekov
- School of Physics and Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, D02PD91 Dublin, Ireland
| | - Nikolai Andreev
- Materials Modeling and Development Laboratory, National University of Science and Technology MISIS, Leninskii Pr. 4, 119991 Moscow, Russia
| | - Nataliya Tabachkova
- Materials Modeling and Development Laboratory, National University of Science and Technology MISIS, Leninskii Pr. 4, 119991 Moscow, Russia
- Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Str. 38, 119991 Moscow, Russia
| | - Igor V. Shvets
- School of Physics and Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, D02PD91 Dublin, Ireland
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5
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Peng B, Zhou H, Liu Z, Li Y, Shang Q, Xie J, Deng L, Zhang Q, Liang D. Pattern-Selective Molecular Epitaxial Growth of Single-Crystalline Perovskite Arrays toward Ultrasensitive and Ultrafast Photodetector. Nano Lett 2022; 22:2948-2955. [PMID: 35289627 DOI: 10.1021/acs.nanolett.2c00074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The emergence of organic-inorganic perovskite has provided great flexibility for creating optoelectronic devices with unprecedented performance or unique functionality. However, the perovskite films explored so far have been difficult to be patterned to arrays owing to their poor solvent and moisture stability, which usually lead to serious structural damage of perovskites. The successful preparation of perovskite microarrays with uniform shape and size is more challenging. Here we report a straightforward approach to realize single-crystalline perovskite arrays through a relatively simple pattern-selective molecular epitaxial growth. This approach is applied to create diverse shaped perovskite arrays, such as hexagon, triangle, circle, square, and rectangle. A vertically aligned perovskite photodetector displays both an ultrasensitive and ultrafast photoresponse arising from the reduction in carrier diffusion paths and the high optical absorption. This work demonstrates a general approach to creating perovskite arrays with uniform shape, size, and morphology and provides a rich platform for producing high-performance photodetectors and photovoltage devices.
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Affiliation(s)
- Bo Peng
- National Engineering Research Center of Electromagnetic Radiation Control Materials, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
- Key Laboratory of Multi Spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Hongmei Zhou
- National Engineering Research Center of Electromagnetic Radiation Control Materials, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
- Key Laboratory of Multi Spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Zhen Liu
- National Engineering Research Center of Electromagnetic Radiation Control Materials, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
- Key Laboratory of Multi Spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Yue Li
- National Engineering Research Center of Electromagnetic Radiation Control Materials, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
- Key Laboratory of Multi Spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Qiuyu Shang
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Jianliang Xie
- National Engineering Research Center of Electromagnetic Radiation Control Materials, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
- Key Laboratory of Multi Spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Longjiang Deng
- National Engineering Research Center of Electromagnetic Radiation Control Materials, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
- Key Laboratory of Multi Spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Qing Zhang
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Difei Liang
- National Engineering Research Center of Electromagnetic Radiation Control Materials, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
- Key Laboratory of Multi Spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731, China
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6
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Xu X, Guo T, Kim H, Hota MK, Alsaadi RS, Lanza M, Zhang X, Alshareef HN. Growth of 2D Materials at the Wafer Scale. Adv Mater 2022; 34:e2108258. [PMID: 34860446 DOI: 10.1002/adma.202108258] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/29/2021] [Indexed: 06/13/2023]
Abstract
Wafer-scale growth has become a critical bottleneck for scaling up applications of van der Waal (vdW) layered 2D materials in high-end electronics and optoelectronics. Most vdW 2D materials are initially obtained through top-down synthesis methods, such as exfoliation, which can only prepare small flakes on a micrometer scale. Bottom-up growth can enable 2D flake growth over a large area. However, seamless merging of these flakes to form large-area continuous films with well-controlled layer thickness and lattice orientation is still a significant challenge. This review briefly introduces several vdW layered 2D materials covering their lattice structures, representative physical properties, and potential roles in large-scale applications. Then, several methods used to grow vdW layered 2D materials at the wafer scale are reviewed in depth. In particular, three strategies are summarized that enable 2D film growth with a single-crystalline structure over the whole wafer: growth of an isolated domain, growth of unidirectional domains, and conversion of oriented precursors. After that, the progress in using wafer-scale 2D materials in integrated devices and advanced epitaxy is reviewed. Finally, future directions in the growth and scaling of vdW layered 2D materials are discussed.
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Affiliation(s)
- Xiangming Xu
- Materials Science and Engineering, Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Tianchao Guo
- Materials Science and Engineering, Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Hyunho Kim
- Materials Science and Engineering, Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Mrinal K Hota
- Materials Science and Engineering, Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Rajeh S Alsaadi
- Materials Science and Engineering, Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Mario Lanza
- Materials Science and Engineering, Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Xixiang Zhang
- Materials Science and Engineering, Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Husam N Alshareef
- Materials Science and Engineering, Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
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7
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Zhang Y, Tao JJ, Chen HY, Lu HL. Preparation of single crystalline AlN thin films on ZnO nanostructures by atomic layer deposition at low temperature. Nanotechnology 2021; 32:275704. [PMID: 33740776 DOI: 10.1088/1361-6528/abf074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 03/19/2021] [Indexed: 06/12/2023]
Abstract
The growth of hetero-epitaxial ZnO-AlN core-shell nanowires (NWs) and single crystalline AlN films on non-polar ZnO substrate at temperature of 380 °C by atomic layer deposition (ALD) was investigated. Structural characterization shows that the AlN shells have excellent single-crystal properties. The epitaxial relationship of [0002]ZnO//[0002]AlN, and [10-10]ZnO//[10-10]AlNbetween ZnO core and AlN shell has been obtained. The ZnO NW templates were subsequently removed by annealing treatment in forming gas, resulting in ordered arrays of AlN single-crystal nanotubes. The impact factors on the epitaxial growth of AlN films are thoroughly investigated. It turned out that the growth parameters including lattice mismatch between substrate and AlN, growth temperature, and the polarity of ZnO substrate play important roles on the growth of single-crystal AlN films by ALD. Finally, non-polar AlN films with single-crystalline structure have been successfully grown onm-plane ZnO (10-10) single-crystal substrates. The as-grown hollow AlN nanotubes arrays and non-polar AlN films with single-crystalline structures are suggested to be highly promising for applications in nanoscale devices. Our research has developed a potential method to obtain other inorganic nanostructures and films with single-crystalline structure at fairly low temperature.
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Affiliation(s)
- Yuan Zhang
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics & Systems, School of Microelectronics, Fudan University, Shanghai 200433, People's Republic of China
- School of Physics and Electronic Information, Huai Bei Normal University, Huaibei 235000, People's Republic of China
| | - Jia-Jia Tao
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics & Systems, School of Microelectronics, Fudan University, Shanghai 200433, People's Republic of China
| | - Hong-Yan Chen
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics & Systems, School of Microelectronics, Fudan University, Shanghai 200433, People's Republic of China
| | - Hong-Liang Lu
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics & Systems, School of Microelectronics, Fudan University, Shanghai 200433, People's Republic of China
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8
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Shen Y, Han Y, Zhan R, Chen X, Wen S, Huang W, Sun F, Wei Y, Chen H, Wu J, Chen J, Xu N, Deng S. Pyramid-Shaped Single-Crystalline Nanostructure of Molybdenum with Excellent Mechanical, Electrical, and Optical Properties. ACS Appl Mater Interfaces 2020; 12:24218-24230. [PMID: 32374587 DOI: 10.1021/acsami.0c02351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Specific geometric morphology and improved crystalline properties are of great significance for the development of materials in micro-nano scale. However, for high-melting molybdenum (Mo), it is difficult to get high-quality structures exhibiting a single-crystalline nature and preconceived morphology simultaneously. In this paper, a pyramid-shaped single-crystalline Mo nanostructure was prepared through a thermal evaporation technique, as well as a series of experimental controls. Based on detailed characterizations, the growth mechanism was demonstrated to follow a sequential process that includes MoO2 decomposition and Mo deposition, single-crystalline islands formation, layered nucleation, and competitive growth. Furthermore, the product was measured to show excellent physical properties. The prepared nanostructures exhibited strong nano-indentation hardness, elastic modulus, and tensile strength in mechanical measurements, which are much higher than those of the Mo bulks. In the measurement of electronic characteristics, the individual structures indicated very good electrical transport properties, with a conductance of ∼0.16 S. The prepared film with an area of 0.02 cm2 showed large-current electron emission properties with a maximum current of 33.6 mA and a current density of 1.68 A cm-2. Optical properties of the structures were measured to show obvious electromagnetic field localization and enhancement, which enabled it to have good surface enhanced Raman scattering (SERS) activity as a substrate material. The corresponding structure-response relationships were further discussed. The reported physical properties profit from the basic features of the Mo nanostructures, including the micro-nano scale, the single-crystalline nature in each grain, as well as the pyramid-shaped top morphology. The findings may provide a potential material for the research and application of micro-nano electrons and photons.
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Affiliation(s)
- Yan Shen
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Yuchen Han
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Runze Zhan
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Xuexian Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Shiya Wen
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Wuchao Huang
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Fengsheng Sun
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Yaoming Wei
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Huanjun Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Jin Wu
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Jun Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Ningsheng Xu
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Shaozhi Deng
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
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9
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Fan L, Gao X, Farmer TO, Lee D, Guo EJ, Mu S, Wang K, Fitzsimmons MR, Chisholm MF, Ward TZ, Eres G, Lee HN. Vertically Aligned Single-Crystalline CoFe 2O 4 Nanobrush Architectures with High Magnetization and Tailored Magnetic Anisotropy. Nanomaterials (Basel) 2020; 10:nano10030472. [PMID: 32150990 PMCID: PMC7153250 DOI: 10.3390/nano10030472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/28/2020] [Accepted: 02/29/2020] [Indexed: 06/10/2023]
Abstract
Micrometer-tall vertically aligned single-crystalline CoFe2O4 nanobrush architectures with extraordinarily large aspect ratio have been achieved by the precise control of a kinetic and thermodynamic non-equilibrium pulsed laser epitaxy process. Direct observations by scanning transmission electron microscopy reveal that the nanobrush crystal is mostly defect-free by nature, and epitaxially connected to the substrate through a continuous 2D interface layer. In contrast, periodic dislocations and lattice defects such as anti-phase boundaries and twin boundaries are frequently observed in the 2D interface layer, suggesting that interface misfit strain relaxation under a non-equilibrium growth condition plays a critical role in the self-assembly of such artificial architectures. Magnetic property measurements have found that the nanobrushes exhibit a saturation magnetization value of 6.16 B/f.u., which is much higher than the bulk value. The discovery not only enables insights into an effective route for fabricating unconventional high-quality nanostructures, but also demonstrates a novel magnetic architecture with potential applications in nanomagnetic devices.
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Affiliation(s)
- Lisha Fan
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, Zhejiang, China
| | - Xiang Gao
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
| | - Thomas O. Farmer
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
| | - Dongkyu Lee
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
| | - Er-Jia Guo
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
| | - Sai Mu
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
| | - Kai Wang
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
| | - Michael R. Fitzsimmons
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA
| | - Matthew F. Chisholm
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
| | - Thomas Z. Ward
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
| | - Gyula Eres
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
| | - Ho Nyung Lee
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; (L.F.); (X.G.); (T.O.F.); (D.L.); (E.-J.G.); (S.M.); (K.W.); (M.R.F.); (M.F.C.); (T.Z.W.); (G.E.)
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10
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Lee S, Bae C, Shin H. Nanometer Scale Confined Growth of Single-Crystalline Gold Nanowires via Photocatalytic Reduction. ACS Appl Mater Interfaces 2018; 10:20929-20937. [PMID: 29883084 DOI: 10.1021/acsami.8b02473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Single-crystalline gold nanowires (Au NWs) are directly synthesized by the photocatalytic reduction of an aqueous HAuCl4 solution inside high-aspect-ratio TiO2 nanotubes (NTs). Crystalline TiO2 (anatase) NTs are prepared by the template-assisted atomic layer deposition technique with a subsequent annealing. Under the irradiation of ultraviolet light, photoexcited electrons are formed on the surfaces of TiO2 NTs and could reduce Au ions to create nuclei without using any surfactant, reducing agent, and/or seed. Once nucleation occurred, high-aspect-ratio Au NWs are grown inside the TiO2 NTs in a diffusion-controlled manner. As the solution pH increased, the nucleation/growth rate decreased and twin-free (or not observed), single-crystalline Au NWs are formed. At a pH above 6, the nucleation/growth rates increased and Au nanoparticles are observed both inside and outside of the TiO2 NTs. The confined nanoscale geometries of the interior of the TiO2 NTs are found to play a key role in the controlled diffusion of Au species and in determining the crystal morphology of the resulting Au NWs.
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Affiliation(s)
- Seonhee Lee
- Department of Energy Science , Sungkyunkwan University , Suwon 440-746 , Republic of Korea
| | - Changdeuck Bae
- Department of Energy Science , Sungkyunkwan University , Suwon 440-746 , Republic of Korea
| | - Hyunjung Shin
- Department of Energy Science , Sungkyunkwan University , Suwon 440-746 , Republic of Korea
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11
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Feng G, Kuang Y, Li P, Han N, Sun M, Zhang G, Sun X. Single Crystalline Ultrathin Nickel-Cobalt Alloy Nanosheets Array for Direct Hydrazine Fuel Cells. Adv Sci (Weinh) 2017; 4:1600179. [PMID: 28331781 PMCID: PMC5357988 DOI: 10.1002/advs.201600179] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 06/18/2016] [Indexed: 06/01/2023]
Abstract
Ultrathin 2D metal alloy nanomaterials have great potential applications but their controlled syntheses are limited to few noble metal based systems. Herein Ni x Co1-x alloy nanosheets with ultrathin (sub-3 nm) single-crystalline 2D structure are synthesized through a topochemical reduction method. Moreover, the optimized composition Ni0.6Co0.4 alloy nanosheets array exhibits excellent performances for hydrazine oxidation reaction and direct hydrazine fuel cells.
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Affiliation(s)
- Guang Feng
- State Key Laboratory of Chemical Resource EngineeringCollege of ScienceBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Yun Kuang
- State Key Laboratory of Chemical Resource EngineeringCollege of ScienceBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Pengsong Li
- State Key Laboratory of Chemical Resource EngineeringCollege of ScienceBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Nana Han
- State Key Laboratory of Chemical Resource EngineeringCollege of ScienceBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Ming Sun
- State Key Laboratory of Chemical Resource EngineeringCollege of ScienceBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Guoxin Zhang
- State Key Laboratory of Chemical Resource EngineeringCollege of ScienceBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Xiaoming Sun
- State Key Laboratory of Chemical Resource EngineeringCollege of EnergyBeijing Advanced Innovation Centre for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing100029P. R. China
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Yuan S, Zhu YH, Li W, Wang S, Xu D, Li L, Zhang Y, Zhang XB. Surfactant-Free Aqueous Synthesis of Pure Single-Crystalline SnSe Nanosheet Clusters as Anode for High Energy- and Power-Density Sodium-Ion Batteries. Adv Mater 2017; 29. [PMID: 27874214 DOI: 10.1002/adma.201602469] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 07/11/2016] [Indexed: 05/14/2023]
Abstract
SnSe with 3D hierarchical nanostructure composed of interconnected single-crystal SnSe nanosheets is synthesized via a fast and effective strategy. Unexpectedly, when used as the anode material for Na-ion batteries (NIBs), the SnSe exhibits a high capacity (738 mA h g-1 ), superior rate capability (40 A g-1 ), and high energy density in a full cell. These results provide the possibility of SnSe use as NIBs anodes.
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Affiliation(s)
- Shuang Yuan
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- Key Laboratory of Automobile Materials, Ministry of Education and College of Materials Science and Engineering, Jilin University, Changchun, 130012, Jilin, China
| | - Yun-Hai Zhu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- Key Laboratory of Automobile Materials, Ministry of Education and College of Materials Science and Engineering, Jilin University, Changchun, 130012, Jilin, China
| | - Wang Li
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Sai Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- Key Laboratory of Automobile Materials, Ministry of Education and College of Materials Science and Engineering, Jilin University, Changchun, 130012, Jilin, China
| | - Dan Xu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Lin Li
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Yu Zhang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Xin-Bo Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
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Nguyen VL, Perello DJ, Lee S, Nai CT, Shin BG, Kim JG, Park HY, Jeong HY, Zhao J, Vu QA, Lee SH, Loh KP, Jeong SY, Lee YH. Wafer-Scale Single-Crystalline AB-Stacked Bilayer Graphene. Adv Mater 2016; 28:8177-8183. [PMID: 27414480 DOI: 10.1002/adma.201601760] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 06/19/2016] [Indexed: 06/06/2023]
Abstract
Single-crystalline artificial AB-stacked bilayer graphene is formed by aligned transfer of two single-crystalline monolayers on a wafer-scale. The obtained bilayer has a well-defined interface and is electronically equivalent to exfoliated or direct-grown AB-stacked bilayers.
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Affiliation(s)
- Van Luan Nguyen
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Physics, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - David J Perello
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Seunghun Lee
- Department of Cogno-mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Chang Tai Nai
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543
| | - Bong Gyu Shin
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Joong-Gyu Kim
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Physics, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Ho Yeol Park
- Department of Cogno-mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Hu Young Jeong
- UNIST Central Research Facilities, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Jiong Zhao
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Quoc An Vu
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Physics, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Sang Hyub Lee
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Physics, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Kian Ping Loh
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543
| | - Se-Young Jeong
- Department of Cogno-mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea.
| | - Young Hee Lee
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea.
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
- Department of Physics, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
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14
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Guo P, Schaller RD, Ocola LE, Ketterson JB, Chang RPH. Gigahertz Acoustic Vibrations of Elastically Anisotropic Indium-Tin-Oxide Nanorod Arrays. Nano Lett 2016; 16:5639-5646. [PMID: 27526053 DOI: 10.1021/acs.nanolett.6b02217] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Active control of light is important for photonic integrated circuits, optical switches, and telecommunications. Coupling light with acoustic vibrations in nanoscale optical resonators offers optical modulation capabilities with high bandwidth and small footprint. Instead of using noble metals, here we introduce indium-tin-oxide nanorod arrays (ITO-NRAs) as the operating media and demonstrate optical modulation covering the visible spectral range (from 360 to 700 nm) with ∼20 GHz bandwidth through the excitation of coherent acoustic vibrations in ITO-NRAs. This broadband modulation results from the collective optical diffraction by the dielectric ITO-NRAs, and a high differential transmission modulation up to 10% is achieved through efficient near-infrared, on-plasmon-resonance pumping. By combining the frequency signatures of the vibrational modes with finite-element simulations, we further determine the anisotropic elastic constants for single-crystalline ITO, which are not known for the bulk phase. This technique to determine elastic constants using coherent acoustic vibrations of uniform nanostructures can be generalized to the study of other inorganic materials.
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Affiliation(s)
- Peijun Guo
- Department of Materials Science and Engineering, Northwestern University , 2220 Campus Drive, Evanston, Illinois 60208, United States
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Building 440, Lemont, Illinois 60439, United States
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Leonidas E Ocola
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Building 440, Lemont, Illinois 60439, United States
| | - John B Ketterson
- Department of Physics and Astronomy, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Robert P H Chang
- Department of Materials Science and Engineering, Northwestern University , 2220 Campus Drive, Evanston, Illinois 60208, United States
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15
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Guo W, Jing F, Xiao J, Zhou C, Lin Y, Wang S. Oxidative-Etching-Assisted Synthesis of Centimeter-Sized Single-Crystalline Graphene. Adv Mater 2016; 28:3152-3158. [PMID: 26916880 DOI: 10.1002/adma.201503705] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/09/2015] [Indexed: 06/05/2023]
Abstract
Centimeter-sized single-crystalline graphene is obtained by an oxidative-etching-assisted chemical vapor deposition (CVD) method. Gaseous oxidants are found to be highly responsible for graphene etching. By diminishing the uncertain amount of H2 O vapor in commercial H2 and precisely introducing additional O2 , the graphene nucleation density can be well controlled.
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Affiliation(s)
- Wei Guo
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Minisrty of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Feng Jing
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Minisrty of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Jian Xiao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Minisrty of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Ce Zhou
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yuanwei Lin
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Shuai Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Minisrty of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
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16
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Kim JH, Lee DH, Yang DS, Heo DU, Kim KH, Shin J, Kim HJ, Baek KY, Lee K, Baik H, Cho MJ, Choi DH. Novel polymer nanowire crystals of diketopyrrolopyrrole-based copolymer with excellent charge transport properties. Adv Mater 2013; 25:4102-4106. [PMID: 23780712 DOI: 10.1002/adma.201301536] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Revised: 05/10/2013] [Indexed: 06/02/2023]
Abstract
The first demonstration of polymer nanowire (PNW) crystals based on a diketopyrrolopyrrole-based copolymer (i.e., PDTTDPP), and their application to field-effect transistors (FETs) is reported. Remarkably, transmission electron microscopy and selected area electron diffraction analyses of the PNW reveal its single-crystalline (SC) nature. FETs fabricated of a SC PNW exhibit a maximal charge carrier mobility of ≈7.00 cm(2) V(-1) s(-1) , which is almost one order of magnitude higher than that of the thin-film transistors made of the same polymer (PDTTDPP).
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Affiliation(s)
- Ji Ho Kim
- Dept. of Chemistry, Research Institute for Natural Sciences, Korea University, 5 Anam-dong, Sungbuk-gu, Seoul, Korea
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17
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Lu CM, Hsu HF, Lu KC. Growth of single-crystalline cobalt silicide nanowires and their field emission property. Nanoscale Res Lett 2013; 8:308. [PMID: 23819795 PMCID: PMC3710505 DOI: 10.1186/1556-276x-8-308] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 06/27/2013] [Indexed: 06/02/2023]
Abstract
In this work, cobalt silicide nanowires were synthesized by chemical vapor deposition processes on Si (100) substrates with anhydrous cobalt chloride (CoCl2) as precursors. Processing parameters, including the temperature of Si (100) substrates, the gas flow rate, and the pressure of reactions were varied and studied; additionally, the physical properties of the cobalt silicide nanowires were measured. It was found that single-crystal CoSi nanowires were grown at 850°C ~ 880°C and at a lower gas flow rate, while single-crystal Co2Si nanowires were grown at 880°C ~ 900°C. The crystal structure and growth direction were identified, and the growth mechanism was proposed as well. This study with field emission measurements demonstrates that CoSi nanowires are attractive choices for future applications in field emitters.
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Affiliation(s)
- Chi-Ming Lu
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Han-Fu Hsu
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Kuo-Chang Lu
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan
- Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan
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