Abstract
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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References
Barrett EPS, Georgiades G E and Sermon P A 1990Sensors Actuators B1 116
Bedja I, Hotchandani S, Carpenties R, Vinodgopal K and Kamat P V 1994Thin Solid Films 347 195
Cantalini C, Pelino M, Sun H T, Faccio M, Santucci S, Lozzi L and Passacantando M 1996Sensors Actuators B35-36 112
Gerand B, Nowogrocki G and Figlarz M 1981J. Solid State Chem. 38 312
Granqvist C G 1995Handbook of inorganic electrochromic materials (Amsterdam: Elsevier B)
Ichinose N 1993Sensors Actuators B13-14 100
Maruyama T and Arai S 1994J. Electrochem. Soc. 141 1024
Nelli P, Depero L E, Ferroni M, Groppelli S, Guidi V, Ronconi F, Sangaletti L and Sberveglieri G 1996Sensors Actuators B31 89
Nogueira H I S, Cavaleiro A M V, Rocha J, Trindade T and Pedrosa de Jesus J D 2004Mater. Res. Bull. 39 683
Pyper O, Schollborn R R, Donkers J J T M and Krings L H M 1998Mater. Res. Bull. 33 1095
Qu W and Mayer J-U 1997Sensors Actuators B40 175
Qu W and Wlodarski W 2000Sensors Actuators B64 42
Riaz U 1993Thin Solid Films 235 15
Shaver P J 1967Appl. Phys. Lett. 11 255
Smith D J, Vetelino J F, Falconer R S and Wittman E L 1993Sensors Actuators B13 264
Yoon J-G and Flanders D C 1978Appl. Phys. Lett. 32 349
Yoon J-G, Oh H K and Lee S J 1999Phys. Rev. B60 2839
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Kunte, G.V., Ail, U., Shivashankar, S.A. et al. Dip-coated hydrotungstite thin films as humidity sensors. Bull Mater Sci 28, 243–248 (2005). https://doi.org/10.1007/BF02711255
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DOI: https://doi.org/10.1007/BF02711255