Sol-gel synthetized titanium dioxide powders and the effect of bacterial bioluminescence.

Delle Side D., Scrimieri L., Di Salvo M., TalĂ  A., Manno D., Serra A., Quarta G., Alifano P., Calcagnile L.

VI - Fisica applicata, acceleratori e beni culturali
Aula 29C-2 - Venerdì 21 h 15:30 - 18:30
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Sol-gel is a common method for the synthesis of titania powders. Several parameters affect the physical properties of the resulting products. Varying the pH of the sol, we analysed powder with X-ray diffraction (Williamson--Hall method) and Diffuse Reflectance Spectroscopy. From our investigations, crystallite size and lattice strain appear to vary randomly. Instead, we show that the pH of the sol influences the band-gap of the resulting powders with a clear trend. As an exploratory application, we assayed the possibility to trigger photocatalysis with bioluminescence. Indeed we found a bacterium with an emission peak with low wavelength (near 450 nm).

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