Electron beam evaporation of tungsten oxide films for gas sensors
Data(s) |
2010
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Resumo |
Pure and Iron incorporated nanostructured Tungsten Oxide (WO3) thin films were investigated for gas sensing applications using noise spectroscopy. The WO3 sensor was able to detect lower concentrations (1 ppm-10 ppm) of NH3, CO, CH4 and Acetaldehyde gases at operating temperatures between 100 degrees celcius to 250 degrees celcius. The iron doped Tungsten Oxide sensor (WO3:Fe) showed some response to Acetaldehyde gas at relatively higher operating temperature (250 degrees celcius) and gas concentration of 10 ppm. The sensitivity of the WO3 sensor towards NH3, CH4 and Acetaldehyde at lower operating temperatures (50 degrees celcius - 100 degrees celcius) was significant when the sensor was photo-activated using blue-light emitting diode (Blue-LED). From the results, photo-activated WO3 thin film that operates at room temperature appeared to be a promising gas sensor. The overall results indicated that the WO3 sensor exhibited reproducibility for the detection of various gases and the WO3:Fe indicated some response towards Acetaldehyde gas. |
Formato |
application/pdf |
Identificador | |
Publicador |
IEEE |
Relação |
http://eprints.qut.edu.au/33167/1/c33167.pdf DOI:10.1109/JSEN.2010.2048427 Tesfamichael, Tuquabo (2010) Electron beam evaporation of tungsten oxide films for gas sensors. IEEE Sensors Journal, 10(11), pp. 1796-1802. |
Direitos |
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Fonte |
Faculty of Built Environment and Engineering; School of Engineering Systems |
Palavras-Chave | #020406 Surfaces and Structural Properties of Condensed Matter #020499 Condensed Matter Physics not elsewhere classified #100708 Nanomaterials #Iron Doping Tungsten Oxide #Nanostructured Thin Films #Gas Sensor #Noise Spectroscopy |
Tipo |
Journal Article |