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CVD elaboration of nanostructured TiO2-Ag thin films with efficient antibacterial properties

Mungkalasiri, Jitti and Bedel, Laurent and Emieux, Fabrice and Dore, Jeanne and Renaud, François N. R. and Sarantopoulos, Christos and Maury, Francis CVD elaboration of nanostructured TiO2-Ag thin films with efficient antibacterial properties. (2010) Chemical Vapor Deposition, vol. 16 (n° 1-3). pp. 35-41. ISSN 0948-1907

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Official URL: http://dx.doi.org/10.1002/cvde.200906764

Abstract

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.

Item Type:Article
Additional Information:Thanks to John Wiley & Sons editor. The definitive version is available at http://eu.wiley.com/ The original PDF of the article can be found at Chemical Vapor Deposition website :http://www3.interscience.wiley.com/journal/123309548/abstract?CRETRY=1&SRETRY=0
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA
French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Université Claude Bernard-Lyon I - UCBL (FRANCE)
Other partners > Nosoco.tech (FRANCE)
Laboratory name:
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Deposited By: Nihad Lahdifi
Deposited On:02 Feb 2011 09:27

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