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Adsorption and electrophysical properties of semiconductors of the InSb-CdS system

  • Physical Chemistry of Surface Phenomena
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Abstract

Adsorption and the electrophysical properties (changes in electrical conductivity) of thin film solid solutions and binary components of the new InSb-CdS system are studied by means of piezoquartz microweighing, IR spectroscopy and probe compensation in the temperature range of 273–353 K and a range of adsorbate gas (NH3, NO2) pressures of 0.2–9.8 Pa. The areas of physical and chemical adsorption accompanied by the charging of the (mostly positive) surface are determined. The mechanisms and regularities of adsorption as a function of external conditions and composition of the system are established, and certain similarities and patterns of changes in the adsorption and electroconductivity, and parallelisms of the “acidbase characteristic-composition,” “adsorption characteristic-composition,” and “electrophysical characteristics-composition” dependences are described. These prove to be useful in studying the adsorption mechanism and in identifying the most active components of the system relative to NH3 and NO2, proposed as materials for respective sensors/detectors.

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Authors and Affiliations

  1. Omsk State Technical University, Omsk, 644050, Russia

    I. A. Kirovskaya & T. N. Filatova

Authors
  1. I. A. Kirovskaya
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  2. T. N. Filatova
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Correspondence to I. A. Kirovskaya.

Additional information

Original Russian Text © I.A. Kirovskaya, T.N. Filatova, 2012, published in Zhurnal Fizicheskoi Khimii, 2012, Vol. 86, No. 4, pp. 722–727.

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Kirovskaya, I.A., Filatova, T.N. Adsorption and electrophysical properties of semiconductors of the InSb-CdS system. Russ. J. Phys. Chem. 86, 639–644 (2012). https://doi.org/10.1134/S0036024412040139

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  • DOI: https://doi.org/10.1134/S0036024412040139

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