Three thin films were prepared by PVD starting from WO3 powder with thicknesses ( 998.7, 1620, 2240 nm ) respectively on glass substrates under limited thermal and pressure conditions, studied their I-V characteristics and calculated the sensitivity for 100 ppm of ethanol vapor adsorption (The temperature of the films have been changed from 25°C to 350°C). A comparison among them was achieved at 300 °C as an operating degree and found that the 1620 nm WO3 has more sensitivity and has more power to adsorb for ethanol vapor on it.
International Letters of Chemistry, Physics and Astronomy (Volume 58)
M. Ali et al., "Sensing Properties of WO3 as Thin Film Prepared by PVD towards Ethanol Vapor", International Letters of Chemistry, Physics and Astronomy, Vol. 58, pp. 77-82, 2015