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

Show simple item record O'Regan, Colm Biswas, Subhajit Barth, Sven Morris, Michael A. Petkov, Nikolay Holmes, Justin D. 2016-02-02T09:22:51Z 2016-02-02T09:22:51Z 2014-04-18
dc.identifier.citation O'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. en
dc.identifier.volume 2 en
dc.identifier.issued 23 en
dc.identifier.startpage 4597 en
dc.identifier.endpage 4605 en
dc.identifier.issn 2050-7526
dc.identifier.doi 10.1039/c4tc00136b
dc.description.abstract We 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.sponsorship Science Foundation Ireland (SFI Grants: 09/SIRG/I1621 and 09/IN.1/I2602) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Royal Society of Chemistry en
dc.rights © The Royal Society of Chemistry, 2014. en
dc.subject Aspect ratio en
dc.subject Catalysts en
dc.subject Film growth en
dc.subject Germanium en
dc.subject Gold en
dc.subject Gold deposits en
dc.subject Nanoparticles en
dc.subject Nanowires en
dc.subject Ternary alloys en
dc.subject Thermoelectricity en
dc.subject Thin films en
dc.subject Diameter dependent en
dc.subject Direct determination en
dc.subject Equilibrium concentration en
dc.subject Germanium nanowires en
dc.subject Heating experiment en
dc.subject Size-controlled growth en
dc.subject Solute concentrations en
dc.subject Ternary eutectic alloys en
dc.subject Silver en
dc.title Size-controlled growth of germanium nanowires from ternary eutectic alloy catalysts en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Justin D. Holmes, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en 2014-05-27T11:05:39Z
dc.description.version Accepted Version en
dc.internal.rssid 256972809
dc.contributor.funder Irish Research Council for Science Engineering and Technology en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Materials Chemistry C en
dc.internal.copyrightchecked No !!CORA!! RSC permits self archiving to institutional repository, authorised version with 12 month embargo en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress en

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