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    Diamond-coated ‘black Si’ as a promising material for high-surface-area electrochemical electrodes and antibacterial surfaces

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    Authors
    May, Paul W.
    Clegg, Michael
    Silva, T.
    Zanin, H.
    Fatibello-Filho, O.
    Celorrio, V.
    Fermin, David
    Welch, Colin C.
    Hazell, Gavin
    Fisher, Leanne E.
    Nobbs, Angela H.
    Su, Bo
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    Affiliation
    University of Chester, University of Bristol, Universidade Fedeal de Sao Carlos, Universidade Estadual de Campinas, Oxford Instruments
    Publication Date
    2016-08-08
    
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    Abstract
    This report describes a method to fabricate high-surface-area boron-doped diamond (BDD) electrodes using so-called ‘black silicon’ (bSi) as a substrate. This is a synthetic nanostructured material that contains high-aspect-ratio nano-protrusions, such as spikes or needles, on the Si surface produced via plasma etching. We now show that coating a bSi surface composed of 15-μm-high needles conformably with BDD produces a robust electrochemical electrode with high sensitivity and high electroactive area. A clinically relevant demonstration of the efficacy of these electrodes is shown by measuring their sensitivity for detection of dopamine (DA) in the presence of an excess of uric acid (UA). Finally, the nanostructured surface of bSi has recently been found to generate a mechanical bactericidal effect, killing both Gram-negative and Gram-positive bacteria at high rates. We will show that BDD-coated bSi also acts as an effective antibacterial surface, with the added advantage that being diamond-coated it is far more robust and less likely to become damaged than Si.
    Citation
    May, P. W., Clegg, M., Silva, T. A., Zanin, H., Fatibello-Filho, O., Celorrio, V., Fermin, D. J., Welch, C. C., Hazell, G., Fisher, L., Nobbs, A. & Su, B. (2016). Diamond-coated ‘black Si’ as a promising material for high-surface-area electrochemical electrodes and antibacterial surfaces. Journal of Materials Chemistry B, 34, 5737-5746
    Publisher
    Royal Society of Chemistry
    Journal
    Journal of Materials Chemistry B
    URI
    http://hdl.handle.net/10034/622046
    DOI
    10.1039/C6TB01774F
    Additional Links
    https://pubs.rsc.org/en/Content/ArticleLanding/2016/TB/C6TB01774F#!divAbstract
    Type
    Article
    Language
    en
    ISSN
    2050-750X
    EISSN
    2050-7518
    ae974a485f413a2113503eed53cd6c53
    10.1039/C6TB01774F
    Scopus Count
    Collections
    Natural Sciences

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