Reversible Antimicrobial Photoswitching in Nanosilver

Authors

  • Cindy Gunawan,

    1. ARC Centre of Excellence for Functional Nanomaterials School of Chemical Sciences and Engineering The University of New South Wales Sydney, NSW 2052 (Australia)
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  • Wey Yang Teoh,

    1. ARC Centre of Excellence for Functional Nanomaterials School of Chemical Sciences and Engineering The University of New South Wales Sydney, NSW 2052 (Australia)
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  • Christopher P. Marquis,

    1. School of Biotechnology and Biomolecular Sciences The University of New South Wales Sydney, NSW 2052 (Australia)
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  • Juniahani Lifia,

    1. ARC Centre of Excellence for Functional Nanomaterials School of Chemical Sciences and Engineering The University of New South Wales Sydney, NSW 2052 (Australia)
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  • Rose Amal

    Corresponding author
    1. ARC Centre of Excellence for Functional Nanomaterials School of Chemical Sciences and Engineering The University of New South Wales Sydney, NSW 2052 (Australia)
    • ARC Centre of Excellence for Functional Nanomaterials School of Chemical Sciences and Engineering The University of New South Wales Sydney, NSW 2052 (Australia).
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  • C. G. and W. Y. T. contributed equally to this work. This work was produced with the financial assistance of the Australian Research Council under the ARC Centres of Excellence Program.

Abstract

original image

Reversible antimicrobial photoswitching of nanosilver on a semiconductor support using a facile and optically selective approach is demonstrated. The non-intrusive cyclical irradiation by UV-A (300–400 nm) and visible light (>450 nm) result in controlled oxidation state dynamics of the nanosilver, which in turn allows its antimicrobial activity to be switched off and on repeatedly (see image).

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