Dip-coated hydrotungstite thin films as humidity sensors | Zendy

G. V. Kunte | Zendy; Ujwala Ail | Zendy; S. A. Shivashankar | Zendy; A. M. Umarji | Zendy

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Dip-coated hydrotungstite thin films as humidity sensors

Author(s) -

G. V. Kunte,

Ujwala Ail,

S. A. Shivashankar,

A. M. Umarji

Publication year - 2005

Publication title -

bulletin of materials science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.35

H-Index - 72

eISSN - 0973-7669

pISSN - 0250-4707

DOI - 10.1007/bf02711255

Subject(s) - materials science , humidity , tungsten oxide , thin film , tungstate , electrical resistance and conductance , diffraction , oxide , relative humidity , tungsten , composite material , nanotechnology , optics , meteorology , metallurgy , physics

Thin films of a hydrated phase of tungsten oxide, viz. hydrotungstite, have been prepared on glass substrates by dipcoating method using ammonium tungstate precursor solution. X-ray diffraction shows the films to have a strongb — 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. A homemade 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.

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