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Biocidal silver and silver/titania composite films grown by chemical vapour deposition

Sheel, DW, Brook, LA, Evans, P, Foster, HA, Yates, HM, Steele, A and Ditta, IB 2008, 'Biocidal silver and silver/titania composite films grown by chemical vapour deposition' , International Journal of Photoenergy, 2008 (168185) .

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    This paper describes the growth and testing of highly active biocidal films based on photocatalytically active films of TiO2, grownby thermal CVD, functionally and structurallymodified by deposition of nanostructured silver via a novel flame assisted combination CVD process. The resulting composite films are shown to be highly durable, highly photocatalytically active and are also shown to possess strong antibacterial behaviour. The deposition control, arising from the described approach, offers the potential to control the film nanostructure, which is proposed to be crucial in determining the photo and bioactivity of the combined film structure, and the transparency of the composite films. Furthermore, we show that the resultant films are active to a range of organisms, including Gram-negative and Gram-positive bacteria, and viruses. The very high-biocidal activity is above that expected from the concentrations of silver present, and this is discussed in terms of nanostructure of the titania/silver surface. These properties are especially significant when combined with the well-known durability of CVD deposited thin films, offering new opportunities for enhanced application in areas where biocidal surface functionality is sought.

    Item Type: Article
    Themes: Energy
    Health and Wellbeing
    Schools: Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
    Journal or Publication Title: International Journal of Photoenergy
    Publisher: Hindawi Publishing Corporation
    Refereed: Yes
    ISSN: 1110-662X
    Depositing User: HM Yates
    Date Deposited: 21 Oct 2011 10:37
    Last Modified: 20 Aug 2013 18:15

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