Room temperature NO2 sensing performance of free-standing mesh-structure vanadium dioxide nanorods by a chemical vapour deposition method
Room temperature NO2 sensing performance of free-standing mesh-structure vanadium dioxide nanorods by a chemical vapour deposition method
复制标题
化学气相沉积法自支撑网状结构二氧化钒纳米棒的室温NO2传感性能
DOI：
10.1016/j.jallcom.2016.06.142
复制
发表时间：
2016-12-05
影响因子：
6.2
通讯作者：
Hu, Ming
中科院分区：
文献类型：
--
作者：
Liang, Jiran;Li, Wenjiao;Hu, Ming
采用化学气相沉积法成功制备了自支撑二氧化钒纳米棒。研究了沉积温度对纳米棒微观结构和室温NO2气敏性能的影响。采用扫描电镜、X射线衍射仪和RTS-8四探针法对纳米棒的形貌和晶体结构进行了表征。结果表明VO 2纳米棒具有自支撑的网状结构和单斜晶体结构。进行了传感器对浓度跨度为1至5 ppm的NO2的室温气敏测量。结果表明，该传感器具有良好的可逆性，对NO2的响应值高达2.42，在n型半导体状态下具有快速的响应和恢复特性。进一步解释了VO 2纳米棒的NO2传感机理。这些结果对VO 2在室温气体传感器中的应用具有重要意义。(C)2016爱思唯尔B. V.保留所有权利。
The free-standing vanadium dioxide nanorods were successfully fabricated by chemical vapour deposition method. The effect of the deposition temperature on the microstructure of nanorods and room temperature NO2 sensing properties were studied. The morphology and crystal structure of as-grown nanorods were characterized by scanning electron microscopy, X-ray diffraction and RTS-8 four probe methods. The results show the free-standing mesh-structure and monoclinic crystalline structure of VO2 nanorods. Room temperature gas sensing measurements of sensors to NO2 with concentration span from 1 to 5 ppm were carried out. The results reveal that the sensors exhibit perfect reversibility with relatively high sensor response value up to 2.42 and fast response and recovery characteristics to NO2 in the n-type semiconducting state. Furthermore, NO2-sensing mechanisms of VO2 nanorods were further explained. These results are significant to the standpoint of VO2 applications in room temperature gas sensor. (C) 2016 Elsevier B.V. All rights reserved.