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Studies on the oxygen sensitivity and microstructure of sol–gel based organic–inorganic hybrid coatings doped with platinum porphyrin dye

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Abstract

Hybrid organic–inorganic nanocomposite coatings were prepared by copolymerizing tetraethylorthosilicate with ethyltriethoxysilane with an acid catalysis process. Oxygen sensor coatings were fabricated by doping the hybrid sol with platinum meso-tetra(pentfluorophenyl) porphyrin. Photophysical properties and oxygen sensitivity of the sensor coatings were studied. The microstructure of the coatings was examined using optical microscopy and scanning electron microscopy. The effect of sol–gel process conditions like precursor silane molar ratio, acid concentration and stirring time of the sol on the oxygen sensitivity and surface microstructure of the sensor coating was studied. Oxygen sensitivity and surface morphology of the coatings were dependent on the sol–gel process parameters.

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Acknowledgments

We are grateful to Dr. A. R. Upadhya, Director, NAL and Dr. K. S. Rajam, Head, Surface Engineering Division for their support and encouragement of this work.

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Authors and Affiliations

  1. Surface Engineering Division, National Aerospace Laboratories, Bangalore, 560017, India

    Bharathibai J. Basu & Jeevan Kamble

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  1. Bharathibai J. Basu
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  2. Jeevan Kamble
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Correspondence to Bharathibai J. Basu.

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Basu, B.J., Kamble, J. Studies on the oxygen sensitivity and microstructure of sol–gel based organic–inorganic hybrid coatings doped with platinum porphyrin dye. J Sol-Gel Sci Technol 52, 24–30 (2009). https://doi.org/10.1007/s10971-009-1996-0

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  • DOI: https://doi.org/10.1007/s10971-009-1996-0

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