1. Photoinduced bactericidal activity of TiO2 films
- Author
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I. S. Golubeva, V. V. Korolichin, S. N. Pleskova, E. A. Pershin, V. N. Burenina, and Yu K Verevkin
- Subjects
Microbial Viability ,biology ,Annealing (metallurgy) ,chemistry.chemical_element ,biology.organism_classification ,medicine.disease_cause ,Applied Microbiology and Biotechnology ,Biochemistry ,Oxygen ,Microbiology ,chemistry ,Staphylococcus epidermidis ,Staphylococcus aureus ,medicine ,Escherichia coli ,Bacteria ,Bacterial Viability ,Nuclear chemistry - Abstract
A decline in CFU of gram-positive and gram-negative bacteria on the surface of UV illuminated TiO2 films (wavelength of 380 nm) is shown. A 29, 45, and 47% decrease in bacterial viability of Staphylococcus aureus, Staphylococcus epidermidis, and Escherichia coli, respectively, was seen following a 12-min exposition. It was first discovered that the reuse of TiO2 films to test a bacterial suspension for viability removes UV-induced bactericidal activity. However, annealing of TiO2 at a temperature above 400 degrees C restores the photoinduced bactericidal activity to its initial state.
- Published
- 2011