School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore.
Nanoscale. 2011 Dec;3(12):4977-83. doi: 10.1039/c1nr11126d. Epub 2011 Oct 20.
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.
TiO(2)-InVO(4) 纳米结构薄膜被涂覆在玻璃基底上，并使用大肠杆菌（E. coli）作为模型细菌，在环境光照下对其杀菌活性进行了系统研究。使用钛异丙醇盐（TTIP）作为前体，通过简单的溶胶-凝胶法制备了均匀的 TiO(2)-InVO(4)纳米结构薄膜。聚乙烯亚胺（PEI）用作表面活性剂，以确保 InVO(4)的均匀分散和牺牲孔诱导剂，从而生成纳米结构薄膜。与未改性的 TiO(2)薄膜相比，当前的 TiO(2)-InVO(4)薄膜在环境光照下表现出增强的杀菌活性。证明细菌的“光固定”对于增强杀菌活性至关重要。提出了一种当前环境光激活纳米结构薄膜的细菌-纳米结构表面相互作用机制。
