Effect of Au Doped WO3 Gas Sensors for NO2 Detection
Gas sensor based on point contact tungsten trioxide (WO3) was prepared by in-situ induction-heating thermal oxidation of tungsten filaments. X-ray diffractometry (XRD) and field emission scanning electron microscopy (FESEM) were employed to analyze the phase and the morphology of the fabricated thin films. The results showed that the WO3 films exhibited a monoclinic phase and were composed of hierarchical micro and nano crystals. The NO2 (1-8 ppm) sensing properties of the point contact sensors based on Pure and Au-sputtering doped (2.5 at%) WO3 films were investigated. The results showed that the gas sensing properties of the Au (2.5 at%) doped WO3 sensors were superior to those of the undoped. The obtained point contact WO3 sensor exhibited the maximum NO2 gas response at 100℃.
Wubin Gao Cheng Dong Xu Liu Yunhan Ling Jialin Sun
School of Materials Science & Engineering, University of Science & Technology Beijing, Beijing, 1000 Department of Materials Science & Engineering, Tsinghua University, Beijing 100084, P.R.China
国际会议
长沙
英文
308-311
2011-06-30（万方平台首次上网日期，不代表论文的发表时间）