Thin-film tin oxide–ethanol sensor
by H.J. Pandya
International Journal of Signal and Imaging Systems Engineering (IJSISE), Vol. 2, No. 1/2, 2009

Abstract: Tin Oxide (SnO₂) thin films grown on glass substrate at 648 K using direct evaporation method with two gold pads deposited on the top for electrical contacts were exposed to ethanol vapours (200-1000 ppm). The operating temperature of the sensor was optimised. The sensitivity variation of films having different thicknesses was studied. To improve the sensitivity and selectivity further, a thin layer of metal oxide was deposited on the sensor surface to work as a catalytic layer and its effect on the performance of the sensor was studied. The response and recovery times of the sensor were determined.

Online publication date: Thu, 19-Nov-2009

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