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Open AccessFeature PaperArticle

Facile Route of Fabricating Long-Term Microbicidal Silver Nanoparticle Clusters against Shiga Toxin-Producing Escherichia coli O157:H7 and Candida auris

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Nanobiotechnology Lab, School of Science, RMIT University, Melbourne VIC 3001, Australia
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RMIT Centre for Additive Manufacturing, School of Engineering, RMIT University, Melbourne VIC 3001, Australia
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CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3169, Australia
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Institute of Biomedicine and Biotechnology, Shenzhen Institute of Advanced Technology, Shenzhen 518055, China
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Department of Chemical and Biomolecular Engineering North Carolina State University, Raleigh, NC 27695, USA
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Authors to whom correspondence should be addressed.
Coatings 2020, 10(1), 28; https://doi.org/10.3390/coatings10010028
Received: 4 November 2019 / Revised: 30 November 2019 / Accepted: 17 December 2019 / Published: 1 January 2020
(This article belongs to the Special Issue Biointerface Coatings for Biomaterials and Biomedical Applications)
Microbial contamination remains a significant issue for many industrial, commercial, and medical applications. For instance, microbial surface contamination is detrimental to numerous aspects of food production, infection transfer, and even marine applications. As such, intense scientific interest has focused on improving the antimicrobial properties of surface coatings via both chemical and physical routes. However, there is a lack of synthetic coatings that possess long-term microbiocidal performance. In this study, silver nanoparticle cluster coatings were developed on copper surfaces via an ion-exchange and reduction reaction, followed by a silanization step. The durability of the microbiocidal activity for these develped surfaces was tested against pathogenic bacterial and fungal species, specifically Escherichia coli O157:H7 and Candida auris, over periods of 1- and 7-days. It was observed that more than 90% of E. coli and C. auris were found to be non-viable following the extended exposure times. This facile material fabrication presents as a new surface design for the production of durable microbicidal coatings which can be applied to numerous applications. View Full-Text
Keywords: copper nanoparticles; silver nanoparticles; nanostructure; nanocluster; antifungal; antibacterial; escherichia coli; candida auris copper nanoparticles; silver nanoparticles; nanostructure; nanocluster; antifungal; antibacterial; escherichia coli; candida auris
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Gangadoo, S.; Elbourne, A.; Medvedev, A.E.; Cozzolino, D.; Truong, Y.B.; Crawford, R.J.; Wang, P.-Y.; Truong, V.K.; Chapman, J. Facile Route of Fabricating Long-Term Microbicidal Silver Nanoparticle Clusters against Shiga Toxin-Producing Escherichia coli O157:H7 and Candida auris. Coatings 2020, 10, 28.

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