Understanding bactericidal performance on ambient light activated TiO2-InVO4 nanostructured films.
TiO(2)-InVO(4) nanostructured films were coated onto glass substrates and systematically investigated for their bactericidal activities using Escherichia coli (E. coli) as the model bacterium under ambient light illumination. The uniform TiO(2)-InVO(4) nanostructured films were prepared using titanium isopropoxide (TTIP) as the precursor via a simple sol-gel approach. Polyethylenimine (PEI) was used as a surfactant to ensure uniform dispersion of InVO(4) and a sacrificial pore-inducing agent, generating nanostructured films. Compared to unmodified TiO(2) film, the current TiO(2)-InVO(4) films exhibited enhanced bactericidal activities under ambient light illumination. Bacterial cell "photo-fixation" was demonstrated to be crucial in enhancing the bactericidal activity. A bacterial-nanostructured surface interaction mechanism was proposed for the current ambient-light activated nanostructured film.
School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore.
Ziming
Z
He
Qingchi
Q
Xu
Timothy Thatt Yang
TT
Tan
D000900:Anti-Bacterial Agents / Q000737:chemistry*; D004926:Escherichia coli / Q000254:growth & development* / Q000648:ultrastructure; D008027:Light; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D014025:Titanium / Q000737:chemistry*
D000900:Anti-Bacterial Agents; D008567:Membranes, Artificial; C009495:titanium dioxide; D014025:Titanium