Show simple item record

dc.contributor.authorBarry, Nicolas P.E.
dc.contributor.authorPitto-Barry, Anaïs
dc.contributor.authorTran, J.
dc.contributor.authorSpencer, S.E.F.
dc.contributor.authorJohansen, A.M.
dc.contributor.authorSanchez, A.M.
dc.contributor.authorDove, A.P.
dc.contributor.authorO'Reilly, R.K.
dc.contributor.authorDeeth, R.J.
dc.contributor.authorBeanland, R.
dc.contributor.authorSadler, P.J.
dc.date.accessioned2017-02-01T10:42:28Z
dc.date.available2017-02-01T10:42:28Z
dc.date.issued2015-07
dc.identifier.citationBarry NPE, Pitto-Barry A, Tran J et al (2015) Osmium atoms and Os2 molecules move faster on selenium-doped compared to sulfur-doped boronic graphenic surfaces. Chemistry of Materials. 27(14): 5100-5105.en_US
dc.identifier.urihttp://hdl.handle.net/10454/11234
dc.descriptionYesen_US
dc.description.abstractWe deposited Os atoms on S- and Se-doped boronic graphenic surfaces by electron bombardment of micelles containing 16e complexes [Os(p-cymene)(1,2-dicarba-closo-dodecarborane-1,2-diselenate/dithiolate)] encapsulated in a triblock copolymer. The surfaces were characterized by energy-dispersive X-ray (EDX) analysis and electron energy loss spectroscopy of energy filtered TEM (EFTEM). Os atoms moved ca. 26× faster on the B/Se surface compared to the B/S surface (233 ± 34 pm·s–1 versus 8.9 ± 1.9 pm·s–1). Os atoms formed dimers with an average Os–Os distance of 0.284 ± 0.077 nm on the B/Se surface and 0.243 ± 0.059 nm on B/S, close to that in metallic Os. The Os2 molecules moved 0.83× and 0.65× more slowly than single Os atoms on B/S and B/Se surfaces, respectively, and again markedly faster (ca. 20×) on the B/Se surface (151 ± 45 pm·s–1 versus 7.4 ± 2.8 pm·s–1). Os atom motion did not follow Brownian motion and appears to involve anchoring sites, probably S and Se atoms. The ability to control the atomic motion of metal atoms and molecules on surfaces has potential for exploitation in nanodevices of the future.en_US
dc.description.sponsorshipWe thank the Leverhulme Trust (Early Career Fellowship No. ECF-2013 414 to NPEB), the University of Warwick (Grant No. RDF 2013-14 to NPEB), the EPSRC (EP/G004897/1 to RKOR), and ERC (Grant No. 247450 to PJS) for support.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttp://dx.doi.org/10.1021/acs.chemmater.5b01853en_US
dc.rights© 2015 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.en_US
dc.subjectOsmium atoms; Os2 molecules; selenium-doped boronic graphenic surfaces; sulfur-doped boronic graphenic surfacesen_US
dc.titleOsmium atoms and Os2 molecules move faster on selenium-doped compared to sulfur-doped boronic graphenic surfacesen_US
dc.status.refereedYesen_US
dc.date.application2015-07-06
dc.typeArticleen_US
dc.type.versionPublished versionen_US
refterms.dateFOA2018-07-26T09:44:29Z


Item file(s)

Thumbnail
Name:
Barry_Chemistry_of_Materials.pdf
Size:
2.710Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record