作者：Jitti Mungkalasiri;Laurent Bedel;Jeanne Dore;Francois N. R. Renaud;Christos Sarantopoulos;Francis Maury;Fabrice Emieux;

作者单位：CIRIMAT, CNRS/INPT/UPS, ENSIACET 4 allee E. Monso, BP 44362, 31432 Toulouse cedex 4 (France);CIRIMAT, CNRS/INPT/UPS, ENSIACET 4 allee E. Monso, BP 44362, 31432 Toulouse cedex 4 (France);CIRIMAT, CNRS/INPT/UPS, ENSIACET 4 allee E. Monso, BP 44362, 31432 To

刊名：Chemical vapor deposition

ISSN：0948-1907

出版年：2010-01-05

卷：16

期：40911

起页：35

止页：41

分类号：TQ175

语种：英文

关键词：Anti-bacterial surfaces;DLI-MOCVD;Nanocomposite coatings;Silver nanoparticles;Titanium dioxide films;

内容简介

Nanostructured TiO2-Ag composite coatings are deposited by direct liquid injection metal-organic (DLI-MO) CVD at 683K in a one-step process. Silver pivalate (AgPiv) and titanium tetra-iso-propoxide (TTIP) are used as Ag and Ti molecular precursors, respectively. Metallic silver nanoparticles are co-deposited with anatase TiO2 on stainless steel, glass, and silicon wafers. The silver particles are uniformly embedded in the oxide matrix through the entire film thickness. The influence of the growth conditions, including injection parameters, is investigated on the chemical, physical, and structural characteristics of the coatings as well as on their anti-bacterial activities. The bacterium Staphylococcus aureus is employed for anti-bacterial tests. The films are bactericidal, according to the JIS Z 2801 standard test performed in the dark, when they contain less than 1 at.-% of silver. UnderUVirradiation they exhibit a photocatalytic activity which decays by increasing the silver content. As a result of this dual functionality, the TiO2-Ag nanocomposite coatings show promising potentialities as long-term anti-bacterial surfaces since selfcleaning can be achieved periodically under UV light in order to maintain an efficient anti-bacterial activity in the dark or in visible light.