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Electrical conduction and NO_2 gas sensing properties of ZnO nanorods

机译：ZnO纳米棒的导电性和NO_2气敏特性

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摘要

Thermally stimulated current (TSC), photoresponse and gas sensing properties of zinc oxide (ZnO) nanorods were investigated depending on heating rates, illumination and dark aging times with using sandwich type electrode system. Vertically aligned ZnO nanorods were grown on indium tin oxide (ITO) coated glass substrate by hydrothermal process. TSC measurements were performed at different heating rates under constant potential. Photoresponse and gas sensing properties were investigated in dry air ambient at 200℃. For gas sensing measurements, ZnO nanorods were exposed to NO_2 (100ppb to 1 ppm) in dark and illuminated conditions and the resulting resistance transient was recorded. It was found from dark electrical measurements that the dependence of the dc conductivity on temperature followed Mott's variable range hopping (VRH) model. In addition, response time and recovery times of ZnO nanorods to NO_2 gas decreased by exposing to white light.
机译：使用夹心式电极系统，根据加热速率，照度和黑暗老化时间，研究了氧化锌（ZnO）纳米棒的热激发电流（TSC），光响应和气敏特性。通过水热工艺在铟锡氧化物（ITO）涂层的玻璃基板上生长垂直排列的ZnO纳米棒。在恒定电势下，以不同的加热速率进行TSC测量。在200℃的干燥空气环境中研究了光响应和气体传感特性。对于气体感测，将ZnO纳米棒在黑暗和光照条件下暴露于NO_2（100ppb至1 ppm），并记录所得的电阻瞬态。从暗电测量中发现，直流电导率对温度的依赖性遵循了Mott的可变范围跳变（VRH）模型。另外，通过暴露于白光，ZnO纳米棒对NO_2气体的响应时间和恢复时间减少。

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  • 来源
    《Applied Surface Science》 |2014年第1期|90-96|共7页
  • 作者

    Yasin Sahin; Sadullah OEztuerk; Necmettin Kilinc; Arif Koesemen; Mustafa Erkovan; Zafer Ziya OEztuerk;

  • 作者单位

    Council of Forensic Medicine, Bahcelievler, 34196 Istanbul, Turkey;

    Gebze Institute of Technology, Science Faculty, Department of Physics, 41400 Gebze, Kocaeli, Turkey;

    Gebze Institute of Technology, Science Faculty, Department of Physics, 41400 Gebze, Kocaeli, Turkey,Koc University, Department of Electrical and Electronics Engineering, Sariyer, 34450 Istanbul, Turkey;

    Gebze Institute of Technology, Science Faculty, Department of Physics, 41400 Gebze, Kocaeli, Turkey,Mus Alparslan University, Department of Physics, 49100 Mus, Turkey;

    SAKARYA University, Engineering Faculty, Department of Metallurgical & Materials Engineering, Esentepe Campus, 54187 Sakarya, Turkey;

    Gebze Institute of Technology, Science Faculty, Department of Physics, 41400 Gebze, Kocaeli, Turkey,TUEBITAK-Marmara Research Center, Materials Institute, 41470 Gebze, Kocaeli, Turkey;

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  • 正文语种 eng
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  • 关键词

    ZnO; Nanorods; Hydrothermal process; TSC; VRH; NO_2 sensor; Photoresponse;

    机译：氧化锌;纳米棒水热过程;TSC;VRH;NO_2传感器;光反应;

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