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Dip-coated hydrotungstite thin films as humidity sensors

Kunte, GV and Ail, Ujwala and Shivashankar, SA and Umarji, AM (2005) Dip-coated hydrotungstite thin films as humidity sensors. In: Bulletin of Materials Science, 28 (3). pp. 243-248.

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Abstract

Thin films of a hydrated phase of tungsten oxide, viz. hydrotungstite,have been prepared on glass substrates by dip-coating method using ammonium tungstate precursor solution. X-ray diffraction shows the films to have a strong b-axis orientation. The resistance of the films is observed to be sensitive to the humidity content of the ambient,indicating possible applications of these films for humidity sensing. Ahome made apparatus designed to measure the d.c. electrical resistance in response to exposure to controlled pulses of a sensing gas has been employed to evaluate the sensitivity of the hydrotungstite films towards humidity.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Indian Academy of Sciences.
Keywords: Tungsten oxide;hydrotungstite;humidity sensing
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 20 Jul 2005
Last Modified: 19 Sep 2010 04:19
URI: http://eprints.iisc.ernet.in/id/eprint/3364

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