Bactericidal activity of black silicon

Elena P Ivanova; Jafar Hasan; Hayden K Webb; Gediminias Vervinskas; Saulius Juodkazis; Vi Khanh Truong; Alex H F Wu; Robert N Lamb; Vladimir A Baulin; Gregory S Watson; Jolanta A Watson; David E Mainwaring; Russell J Crawford

doi:10.1038/ncomms3838

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Bactericidal activity of black silicon

Elena P Ivanova, Jafar Hasan, Hayden K Webb, Gediminias Vervinskas, Saulius Juodkazis, Vi Khanh Truong, Alex H F Wu, Robert N Lamb, Vladimir A Baulin, Gregory S Watson, …

Nature Communications, Vol.4(2838), pp.1-7

2013

DOI: https://doi.org/10.1038/ncomms3838

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Abstract

chemical sciences

materials science

nanotechnology

Black silicon is a synthetic nanomaterial that contains high aspect ratio nanoprotrusions on its surface, produced through a simple reactive-ion etching technique for use in photovoltaic applications. Surfaces with high aspect-ratio nanofeatures are also common in the natural world, for example, the wings of the dragonfly Diplacodes bipunctata. Here we show that the nanoprotrusions on the surfaces of both black silicon and D. bipunctata wings form hierarchical structures through the formation of clusters of adjacent nanoprotrusions. These structures generate a mechanical bactericidal effect, independent of chemical composition. Both surfaces are highly bactericidal against all tested Gram-negative and Gram-positive bacteria, and endospores, and exhibit estimated average killing rates of up to ~450,000 cells min-1 cm-2. This represents the first reported physical bactericidal activity of black silicon or indeed for any hydrophilic surface. This biomimetic analogue represents an excellent prospect for the development of a new generation of mechano-responsive, antibacterial nanomaterials.

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Title: Bactericidal activity of black silicon
Authors: Elena P Ivanova (Author) - Swinburne University of Technology
Jafar Hasan (Author) - Swinburne University of Technology
Hayden K Webb (Author) - Swinburne University of Technology
Gediminias Vervinskas (Author) - Swinburne University of Technology
Saulius Juodkazis (Author) - Swinburne University of Technology
Vi Khanh Truong (Author) - Swinburne University of Technology
Alex H F Wu (Author) - University of Melbourne
Robert N Lamb (Author) - University of Melbourne
Vladimir A Baulin (Author) - Universitat Rovira i Virgili, Spain
Gregory S Watson (Author) - James Cook University
Jolanta A Watson (Author) - James Cook University
David E Mainwaring (Author) - Swinburne University of Technology
Russell J Crawford (Author) - Swinburne University of Technology
Publication details: Nature Communications, Vol.4(2838), pp.1-7
Publisher: Nature Publishing Group
Date published: 2013
DOI: 10.1038/ncomms3838
ISSN: 2041-1723
Copyright note: Copyright © 2013 The Authors. This work is licensed under a Creative Commons Attribution- NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99449242402621
Output Type: Journal article

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