Large-scale SnO2 nanowires synthesized by direct sublimation method and their enhanced dielectric responses |
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| Authors: | PG Li M Lei X Wang WH Tang |
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| Affiliation: | 1. Department of Physics, Center for Optoelectronics Materials and Devices, Zhejiang Sci-Tech University, Xiasha College Park, Hangzhou 310018, China;2. Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;1. Department of Physics, Institute of Microsystem, Key Laboratory for Photovoltaic Materials of Henan Province, Henan University, Kaifeng 475004, China;2. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China;3. Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;1. State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi''an 710072, China;2. School of Mechatronic Engineering, Northwestern Polytechnical University, Xi''an 710072, China |
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| Abstract: | In this paper, we developed a direct sublimation method to synthesize large-scale rutile SnO2 nanowires on 6H–SiC substrate using SnO2 nanoparticles as starting material. The structural properties of these straight nanowires were investigated in detail. These nanowires grow along 121], and the average diameter and length of these nanowires are 80 nm and 5 μm, respectively. In addition, the dielectric measurement indicates that the dielectric response of the SnO2 nanowires is significantly enhanced in the low-frequency range. It is suggested that both the rotation direction polarization (RDP) and the space charge polarization (SCP) process should be responsible for the enhancement of εr of these SnO2 nanowires. |
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