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      https://www.ias.ac.in/article/fulltext/boms/028/03/0243-0248

    • Keywords

       

      Tungsten oxide; hydrotungstite; humidity sensing.

    • 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. 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.

    • Author Affiliations

       

      G V Kunte1 Ujwala Ail1 S A Shivashankar1 A M Umarji1

      1. Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India
    • Dates

       
  • Bulletin of Materials Science | News

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