期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 199, 期 -, 页码 403-409出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.03.108
关键词
ZnO; Doping; Gas-sensing; Current-voltage curve; AC impedance spectroscopy
资金
- National Natural Science Foundation of China [51172187]
- SPDRF [20116102130002, 20116102120016]
- 111 Program [B08040]
- Xi'an Science and Technology Foundation [CX1261-2, CX1261-3, CX12174, XBCL-1-08]
- Shaanxi Province Science Foundation [2013KW12-02]
- NPU Fundamental Research Foundation of China [NPU-FRF-JC201232]
- Shaanxi Province Foundation for Returned Scholars, Aeronautical Science Foundation [2013ZF53072]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
Ni-doped zinc oxide (ZnO) nanorods had been successfully fabricated via a fast microwave-assisted hydrothermal synthesis at 150 degrees C. The morphology and composition were carefully characterized by X-ray diffraction, field emission scanning electronic microscopy, and transmission electron microscopy. Gas-sensing testing results demonstrated that Ni-doped ZnO nanorods had enhanced gas-sensing performance. Furthermore, AC impedance spectroscopy and DC current-voltage curves were observed to investigate the gas-sensing mechanism. Current-voltage curves are approximately close to a linear function, indicating the potential barriers formed at the electron-depleted surface layer occupy a dominant when carriers transport in the gas sensor, and AC impedance spectra indicates the potential barriers height of the electron-depleted surface layer. (C) 2014 Elsevier B.V. All rights reserved.
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