Figure 1. Antimicrobial TiO₂ photocatalysis of microbial cells is potentiated by addition of NaBr.

Cells were stirred in the presence of TiO₂ (0 or 10 mM) and NaBr (0 or 10 mM) while being exposed to increasing fluences of UVA light. (A) MRSA (10(8) cells/mL); (B) E. coli (10(8) cells/mL); (C) C. albicans (10(7) cells/mL). Values are means of 3 repetitions and bars are SD. * p < 0.05; ** p < 0.01; *** p < 0.001 for TiO₂ + NaBr vs TiO₂ alone.