12 May 2014 Sensitive films based on porous sol-gel silica
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Proceedings Volume 9228, Optical Fibers and Their Applications 2014; 92280H (2014) https://doi.org/10.1117/12.2066303
Event: 15th Conference on Optical Fibers and Their Applications, 2014, Lipowy Most, Poland
The paper is devoted to the sensitive films for application in chemical sensors. These films, made of the sol-gel derived porous silica, were fabricated via a sol-gel dip-coating method. We have obtained silica layers of the minimum refractive index of ~ 1.22 and porosity ~47%. These layers were sensitized with a pH indocator - bromocresole purple. The indicator was introduced into porous silica layers by means of impregnation. Methods and results of characterization of porous silica films, before and after sensitization are presented in this paper. It was shown that films are very sensitive toward ammonia.
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P. Karasiński, P. Karasiński, C. Tyszkiewicz, C. Tyszkiewicz, M. Szponik, M. Szponik, R. Rogoziński, R. Rogoziński, "Sensitive films based on porous sol-gel silica", Proc. SPIE 9228, Optical Fibers and Their Applications 2014, 92280H (12 May 2014); doi: 10.1117/12.2066303; https://doi.org/10.1117/12.2066303

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