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dc.contributor.authorHazell, Gavin*
dc.contributor.authorMay, Paul W.*
dc.contributor.authorTaylor, Paul W.*
dc.contributor.authorNobbs, Angela H.*
dc.contributor.authorSu, Bo*
dc.date.accessioned2018-05-25T10:42:59Z
dc.date.available2018-05-25T10:42:59Z
dc.date.issued2018-03-27
dc.identifier.citationHazell, G., May, P. W., Taylor, P., Nobbs, A. H. N., & Su, B. (2018). Studies of black silicon and black diamond as materials for antibacterial surfaces. Biomaterials Science, 6, 1424-1432. http://doi.org/10.1039/c8bm00107cen
dc.identifier.doi10.1039/c8bm00107c
dc.identifier.urihttp://hdl.handle.net/10034/621150
dc.description.abstract‘Black silicon’ (bSi) samples with surfaces covered in nanoneedles of varying length, areal density and sharpness, have been fabricated using a plasma etching process. These nanostructures were then coated with a conformal uniform layer of diamond using hot filament chemical vapour deposition to produce ‘black diamond’ (bD) surfaces. The effectiveness of these bSi and bD surfaces in killing Gram-negative (E. coli) and Gram-positive (S. gordonii) bacteria was investigated by culturing the bacteria on the surfaces for a set time and then measuring the live-to-dead ratio. All the nanostructured surfaces killed E. coli at a significantly higher rate than the respective flat Si or diamond control samples. The length of the needles was found to be less important than their separation, i.e. areal density. This is consistent with a model for mechanical bacteria death based on the stretching and disruption of the cell membrane, enhanced by the cells motility on the surfaces. In contrast, S. gordonii were unaffected by the nanostructured surfaces, possibly due to their smaller size, thicker cell membrane and/or their lack of motility.
dc.language.isoenen
dc.publisherRoyal Society of Chemistryen
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2018/BM/C8BM00107C#!divAbstracten
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectAntibacterialen
dc.subjectColloidsen
dc.subjectMaterialsen
dc.subjectSurfacesen
dc.titleStudies of black silicon and black diamond as materials for antibacterial surfacesen
dc.typeArticleen
dc.identifier.eissn2047-4849
dc.contributor.departmentUniversity of Bristol; Oxford Instruments Plasma Technologyen
dc.identifier.journalBiomaterials Science
or.grant.openaccessYesen
rioxxterms.funderMedical Research Councilen
rioxxterms.identifier.projectMR/N010345/1en
rioxxterms.versionAMen
rioxxterms.versionofrecordhttps://doi.org/10.1039/c8bm00107c
rioxxterms.licenseref.startdate2019-03-27
html.description.abstract‘Black silicon’ (bSi) samples with surfaces covered in nanoneedles of varying length, areal density and sharpness, have been fabricated using a plasma etching process. These nanostructures were then coated with a conformal uniform layer of diamond using hot filament chemical vapour deposition to produce ‘black diamond’ (bD) surfaces. The effectiveness of these bSi and bD surfaces in killing Gram-negative (E. coli) and Gram-positive (S. gordonii) bacteria was investigated by culturing the bacteria on the surfaces for a set time and then measuring the live-to-dead ratio. All the nanostructured surfaces killed E. coli at a significantly higher rate than the respective flat Si or diamond control samples. The length of the needles was found to be less important than their separation, i.e. areal density. This is consistent with a model for mechanical bacteria death based on the stretching and disruption of the cell membrane, enhanced by the cells motility on the surfaces. In contrast, S. gordonii were unaffected by the nanostructured surfaces, possibly due to their smaller size, thicker cell membrane and/or their lack of motility.
rioxxterms.publicationdate2018-03-27
dc.dateAccepted2018-03-26
dc.date.deposited2018-05-25


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