Nanostructured TiO2 anatase-rutile-carbon solid coating with visible light antimicrobial activity

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dc.contributor.authorKrumdieck S
dc.contributor.authorBoichot R
dc.contributor.authorGorthy R
dc.contributor.authorLand J
dc.contributor.authorLay S
dc.contributor.authorGardecka A
dc.contributor.authorPolson M
dc.contributor.authorWasa A
dc.contributor.authorAitken J
dc.contributor.authorHeinemann J
dc.contributor.authorRenou G
dc.contributor.authorBerthome G
dc.contributor.authorCharlot F
dc.contributor.authorEncinas T
dc.contributor.authorBraccini M
dc.contributor.authorBishop CM
dc.date.accessioned2019-10-21T22:10:20Z
dc.date.available2019-10-21T22:10:20Z
dc.date.issued2018en
dc.date.updated2019-01-31T04:04:21Z
dc.description.abstractTiO2 photocatalyst is of interest for antimicrobial coatings on hospital touch-surfaces. Recent research has focused on visible spectrum enhancement of photocatalytic activity. Here, we report TiO2 with a high degree of nanostructure, deposited on stainless steel as a solid layer more than 10 μm thick by pulsed-pressure-MOCVD. The TiO2 coating exhibits a rarely-reported microstructure comprising anatase and rutile in a composite with amorphous carbon. Columnar anatase single crystals are segmented into 15–20 nm thick plates, resulting in a mille-feuilles nanostructure. Polycrystalline rutile columns exhibit dendrite generation resembling pine tree strobili. We propose that high growth rate and co-deposition of carbon contribute to formation of the unique nanostructures. High vapor flux produces step-edge instabilities in the TiO2, and solid carbon preferentially co-deposits on certain high energy facets. The equivalent effective surface area of the nanostructured coating is estimated to be 100 times higher than standard TiO2 coatings and powders. The coatings prepared on stainless steel showed greater than 3-log reduction in viable E coli after 4 hours visible light exposure. The pp-MOCVD approach could represent an up-scalable manufacturing route for supported catalysts of functional nanostructured materials without having to make nanoparticles.en
dc.identifier.citationNanostructured TiO2 anatase-rutile-carbon solid coating with visible light antimicrobial activity Susan P. Krumdieck, Raphaël Boichot, Rukmini Gorthy, Johann G. Land, Sabine Lay, Aleksandra J. Gardecka, Matthew I. J. Polson, Alibe Wasa, Jack E. Aitken, Jack A. Heinemann, Gilles Renou, Grégory Berthomé, Frédéric Charlot, Thierry Encinas, Muriel Braccini & Catherine M. Bishop Scientific Reports, volume 9, Article number: 1883 (2019)en
dc.identifier.doihttps://doi.org/10.1038/s41598-018-38291-y
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/10092/17478
dc.language.isoen
dc.rightsOpen Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.en
dc.subject.anzsrcFields of Research::34 - Chemical sciences::3406 - Physical chemistry::340603 - Colloid and surface chemistryen
dc.titleNanostructured TiO2 anatase-rutile-carbon solid coating with visible light antimicrobial activityen
dc.typeJournal Articleen
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