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Sol-Gel Derived Thin Films for Hydrogen Sulphide Gas Sensing

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Abstract

Utilizing the sol-gel fabrication route, we have successfully modified and tailored the optical absorption in the visible spectrum of thionine dye trapped in an MTMS gel-matrix to coincide with the emission of a red diode laser operating at 660 nm. These thionine-doped MTMS thin films coated onto transparent substrates have shown a remarkable change in optical absorption in the presence of gaseous hydrogen sulphide (H2S) diluted in air and in the absence of any buffer gas. The rapid response, sensitivity, reversibility and durability shown by this material can be exploited in developing absorption-based optical H2S sensors in either an integrated optics or all-optical fiber approach using a red diode laser source.

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Authors and Affiliations

  1. Optoelectronics Division, Department of Electronics and Electrical Engineering, Royal College, University of Strathclyde, 204 George Street, Glasgow, GI 1XW, Scotland, UK. E-mail

    Uzer M. Noor & Deepak Uttamchandani

Authors
  1. Uzer M. Noor
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  2. Deepak Uttamchandani
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Noor, U.M., Uttamchandani, D. Sol-Gel Derived Thin Films for Hydrogen Sulphide Gas Sensing. Journal of Sol-Gel Science and Technology 11, 177–183 (1998). https://doi.org/10.1023/A:1008649631712

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  • DOI: https://doi.org/10.1023/A:1008649631712

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