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  • Bactericidal Effects of Natural Nanotopography of Dragonfly Wing on Escherichia coli

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    Ostrikov196597-Accepted.pdf (4.511Mb)
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    Accepted Manuscript (AM)
    Author(s)
    Bandara, Chaturanga D
    Singh, Sanjleena
    Afara, Isaac O
    Wolff, Annalena
    Tesfamichael, Tuquabo
    Ostrikov, Kostya
    Oloyede, Adekunle
    Griffith University Author(s)
    Ostrikov, Ken
    Year published
    2017
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    Abstract
    Nanotextured surfaces (NTSs) are critical to organisms as self-adaptation and survival tools. These NTSs have been actively mimicked in the process of developing bactericidal surfaces for diverse biomedical and hygiene applications. To design and fabricate bactericidal topographies effectively for various applications, understanding the bactericidal mechanism of NTS in nature is essential. The current mechanistic explanations on natural bactericidal activity of nanopillars have not utilized recent advances in microscopy to study the natural interaction. This research reveals the natural bactericidal interaction between E. ...
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    Nanotextured surfaces (NTSs) are critical to organisms as self-adaptation and survival tools. These NTSs have been actively mimicked in the process of developing bactericidal surfaces for diverse biomedical and hygiene applications. To design and fabricate bactericidal topographies effectively for various applications, understanding the bactericidal mechanism of NTS in nature is essential. The current mechanistic explanations on natural bactericidal activity of nanopillars have not utilized recent advances in microscopy to study the natural interaction. This research reveals the natural bactericidal interaction between E. coli and a dragonfly wing’s (Orthetrum villosovittatum) NTS using advanced microscopy techniques and proposes a model. Contrary to the existing mechanistic models, this experimental approach demonstrated that the NTS of Orthetrum villosovittatum dragonfly wings has two prominent nanopillar populations and the resolved interface shows membrane damage occurred without direct contact of the bacterial cell membrane with the nanopillars. We propose that the bacterial membrane damage is initiated by a combination of strong adhesion between nanopillars and bacterium EPS layer as well as shear force when immobilized bacterium attempts to move on the NTS. These findings could help guide the design of novel biomimetic nanomaterials by maximizing the synergies between biochemical and mechanical bactericidal effects.
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    Journal Title
    ACS Applied Materials & Interfaces
    Volume
    9
    Issue
    8
    DOI
    https://doi.org/10.1021/acsami.6b13666
    Copyright Statement
    This document is the Accepted Manuscript versionof a Published Work that appeared in final form in ACS Applied Materials & Interfaces, © 2017 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsami.6b13666
    Subject
    Chemical sciences
    Engineering
    Science & Technology
    Nanoscience & Nanotechnology
    Materials Science, Multidisciplinary
    Science & Technology - Other Topics
    Publication URI
    http://hdl.handle.net/10072/401989
    Collection
    • Journal articles

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