Size-controlled growth of germanium nanowires from ternary eutectic alloy catalysts

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dc.contributor.authorO'Regan, Colm
dc.contributor.authorBiswas, Subhajit
dc.contributor.authorBarth, Sven
dc.contributor.authorMorris, Michael A.
dc.contributor.authorPetkov, Nikolay
dc.contributor.authorHolmes, Justin D.
dc.contributor.funderIrish Research Council for Science Engineering and Technologyen
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2016-02-02T09:22:51Z
dc.date.available2016-02-02T09:22:51Z
dc.date.issued2014-04-18
dc.date.updated2014-05-27T11:05:39Z
dc.description.abstractWe report the size-controlled growth of Ge nanowires from Au-Ag-Ge ternary alloy catalysts. Significantly, Au-Ag-Ge layered thin films enabled, for the first time, the synthesis of high aspect ratio Ge nanowires by simultaneously manipulating both the solute concentration (C) and equilibrium concentration (Ceq.) of Ge in the catalysts, thereby increasing the Ge supersaturation during vapour-liquid-solid (VLS) growth. Simultaneous manipulation of C and Ceq. to enhance nanowire growth rates was also achieved using colloidal Au0.75-Ag0.25 nanoparticles deposited on a Ge film. These nanoparticles produced Ge nanowires with more uniform diameter distributions than those obtained from the thin films. The manifestation of the Gibbs-Thomson effect, resulting in a diameter dependent growth rate, was observed for all nanowires grown from Au0.75-Ag0.25 nanoparticles. In situ TEM heating experiments performed on the as-grown Ge nanowires enabled direct determination of the Ge equilibrium concentrations in the Au-Ag-Ge ternary alloys.en
dc.description.sponsorshipScience Foundation Ireland (SFI Grants: 09/SIRG/I1621 and 09/IN.1/I2602)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationO'REGAN, C., BISWAS, S., BARTH, S., MORRIS, M. A., PETKOV, N. & HOLMES, J. D. 2014. Size-controlled growth of germanium nanowires from ternary eutectic alloy catalysts. Journal of Materials Chemistry C, 2, 4597-4605. http://dx.doi.org/10.1039/C4TC00136Ben
dc.identifier.doi10.1039/c4tc00136b
dc.identifier.endpage4605en
dc.identifier.issn2050-7526
dc.identifier.issued23en
dc.identifier.journaltitleJournal of Materials Chemistry Cen
dc.identifier.startpage4597en
dc.identifier.urihttps://hdl.handle.net/10468/2237
dc.identifier.volume2en
dc.language.isoenen
dc.publisherRoyal Society of Chemistryen
dc.relation.urihttp://pubs.rsc.org/en/content/articlepdf/2014/tc/c4tc00136b
dc.rights© The Royal Society of Chemistry, 2014.en
dc.subjectAspect ratioen
dc.subjectCatalystsen
dc.subjectFilm growthen
dc.subjectGermaniumen
dc.subjectGolden
dc.subjectGold depositsen
dc.subjectNanoparticlesen
dc.subjectNanowiresen
dc.subjectTernary alloysen
dc.subjectThermoelectricityen
dc.subjectThin filmsen
dc.subjectDiameter dependenten
dc.subjectDirect determinationen
dc.subjectEquilibrium concentrationen
dc.subjectGermanium nanowiresen
dc.subjectHeating experimenten
dc.subjectSize-controlled growthen
dc.subjectSolute concentrationsen
dc.subjectTernary eutectic alloysen
dc.subjectSilveren
dc.titleSize-controlled growth of germanium nanowires from ternary eutectic alloy catalystsen
dc.typeArticle (peer-reviewed)en
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