Paper Title:
Effect of Au Doped WO3 Gas Sensors for NO2 Detection
  Abstract

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°C.

  Info
Periodical
Edited by
Yiwang Bao, Danyu Jiang, Li Tian and Jianghong Gong
Pages
308-311
DOI
10.4028/www.scientific.net/KEM.492.308
Citation
W. B. Gao, C. Dong, X. Liu, Y. H. Ling, J. L. Sun, "Effect of Au Doped WO3 Gas Sensors for NO2 Detection", Key Engineering Materials, Vol. 492, pp. 308-311, 2012
Online since
September 2011
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$32.00
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