Effect of Au Doped WO3 Gas Sensors for NO2 Detection
| Autor: | Jia Lin Sun, Cheng Dong, Yun Han Ling, Xu Liu, Wu Bin Gao |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Thermal oxidation
Materials science Morphology (linguistics) Mechanical Engineering Doping Analytical chemistry chemistry.chemical_element Nanotechnology Tungsten Tungsten trioxide chemistry.chemical_compound chemistry Mechanics of Materials Phase (matter) General Materials Science Thin film Monoclinic crystal system |
| Zdroj: | Key Engineering Materials. 492:308-311 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.492.308 |
| Popis: | 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 WO3films 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%) WO3films were investigated. The results showed that the gas sensing properties of the Au (2.5 at%) doped WO3sensors were superior to those of the undoped. The obtained point contact WO3sensor exhibited the maximum NO2gas response at 100°C. |
| Databáze: | OpenAIRE |
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