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Proceedings Paper

NiCl2/SiO2 sol-gel material for ammonia sensing
Author(s): Anna Tsigara; Nicholas Madamopoulos; Mike Hands; Loukas Athanasekos; Anastasia Meristoudi; George Mousdis; Giannis Manasis; Nikos Vainos; Ioannis Koutselas
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Paper Abstract

NiCl2/SiO2 sol gel materials are proposed for the first time for ammonia sensing. Thin films are prepared by spin coating or casting the solution on appropriate substrates and tested for sensitivity in ammonia environment. We report a uniform optical response over the visible spectrum in optical transmission. The main mechanism of operation is based on reversible physico-chemical complexation effects, which produce morphology alteration and result in enhanced optical scattering of the thin film material. Such ammonia sensor can find applications in industrial and environmental engineering fields including "on-line" process and quality control, environment monitoring and safety.

Paper Details

Date Published: 17 October 2006
PDF: 9 pages
Proc. SPIE 6377, Advanced Environmental, Chemical, and Biological Sensing Technologies IV, 63770B (17 October 2006); doi: 10.1117/12.685106
Show Author Affiliations
Anna Tsigara, The National Hellenic Research Foundation (Greece)
National Technical Univ. of Athens (Greece)
Nicholas Madamopoulos, The National Hellenic Research Foundation (Greece)
Mike Hands, The National Hellenic Research Foundation (Greece)
Loukas Athanasekos, The National Hellenic Research Foundation (Greece)
Anastasia Meristoudi, The National Hellenic Research Foundation (Greece)
George Mousdis, The National Hellenic Research Foundation (Greece)
Giannis Manasis, The National Hellenic Research Foundation (Greece)
Nikos Vainos, The National Hellenic Research Foundation (Greece)
Univ. of Patras (Greece)
Ioannis Koutselas, Univ. of Patras (Greece)


Published in SPIE Proceedings Vol. 6377:
Advanced Environmental, Chemical, and Biological Sensing Technologies IV
Tuan Vo-Dinh; Robert A. Lieberman; Günter Gauglitz, Editor(s)

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