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Optical Gas Sensing Properties of Silica Film Doped with Cobalt Oxide Nanocrystals |
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| Authors: | A. Martucci D. Buso M. Guglielmi L. Zbroniec N. Koshizaki M. Post |
| Affiliation: | (1) Dipartimento di Ingegneria Meccanica Set. Materiali, INSTM and Università di Padova, Via Marzolo 9, 35131 Padova, Italy;(2) National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba Ibaraki, 8565, Japan;(3) ICPET, National Research Council of Canada, Ottawa, Canada |
| Abstract: | SiO2 sol-gel films doped with cobalt oxide nanocrystals have been fabricated. The nanocrystals precipitate in the glass film at 500_°C, while the film is still porous. The nanocomposite films showed a reversible change in the optical transmittance when exposed to CO in the 250 <  < 850 nm range. The effects of the residual porosity and testing temperature have been studied. The gas sensing properties of the cobalt oxide nanocrystals doped films are compared with those of nickel oxide nanocrystals doped silica film, previously reported. |
| Keywords: | nanocrystals optics gas sensor cobalt oxide nanoporosity |
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