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Electroactive polyhydroquinone coatings for marine fouling prevention-A rejected dynamic ph hypothesis and a deceiving artifact in electrochemical antifouling testing
University College London, Australia; University of South Australia, Australia.
University of South Australia, Australia; Tarbiat Modares University, Iran.
University of South Australia, Australia.
RISE - Research Institutes of Sweden, Bioscience and Materials. University of South Australia, Australia.
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2017 (English)In: ACS Omega, ISSN 2470-1343, Vol. 2, no 8, p. 4751-4759Article in journal (Refereed) Published
Abstract [en]

Nanometer-Thin coatings of polyhydroquinone (PHQ), which release and absorb protons upon oxidation and reduction, respectively, were tested for electrochemically induced anti-biofouling activity under the hypothesis that a dynamic pH environment would discourage fouling. Antifouling tests in artificial seawater using the marine, biofilm-forming bacterium Vibrio alginolyticus proved the coatings to be ineffective in fouling prevention but revealed a deceiving artifact from the reactive species generated at the counter electrode (CE), even for electrochemical bias potentials as low as |400| mV versus Ag|AgCl. These findings provide valuable information on the preparation of nanothin PHQ coatings and their electrochemical behavior in artificial seawater. The results further demonstrate that it is critical to isolate the CE in electrochemical anti-biofouling testing.

Place, publisher, year, edition, pages
American Chemical Society , 2017. Vol. 2, no 8, p. 4751-4759
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Chemical Sciences
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URN: urn:nbn:se:ri:diva-38095DOI: 10.1021/acsomega.7b00485Scopus ID: 2-s2.0-85030463266OAI: oai:DiVA.org:ri-38095DiVA, id: diva2:1294925
Available from: 2019-03-08 Created: 2019-03-08 Last updated: 2019-03-13Bibliographically approved

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