Germanium nanowire synthesis from fluorothiolate-capped gold nanoparticles in supercritical carbon dioxide

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dc.contributor.author Collins, Gillian
dc.contributor.author Koleśnik-Gray, Maria M.
dc.contributor.author Krstić, Vojislav
dc.contributor.author Holmes, Justin D.
dc.date.accessioned 2018-08-30T10:49:09Z
dc.date.available 2018-08-30T10:49:09Z
dc.date.issued 2010-08-20
dc.identifier.citation Collins, G., Koleśnik, M., Krstić, V. and Holmes, J. D. (2010) 'Germanium Nanowire Synthesis from Fluorothiolate-Capped Gold Nanoparticles in Supercritical Carbon Dioxide', Chemistry of Materials, 22(18), pp. 5235-5243. doi: 10.1021/cm1012137 en
dc.identifier.volume 22 en
dc.identifier.startpage 5235 en
dc.identifier.endpage 5243 en
dc.identifier.issn 0897-4756
dc.identifier.uri http://hdl.handle.net/10468/6688
dc.identifier.doi 10.1021/cm1012137
dc.description.abstract Ge nanowires seeded from Au nanoparticles capped with fluorothiolate ligands were synthesized in supercritical carbon dioxide (sc-CO2) by the thermal decomposition of diphenylgermane (DPG) at a temperature of 380 °C and a pressure of 25.7 MPa. Both perfluorinated and semifluorinated capped Au nanoparticles acted as effective catalysts for growing Ge nanowires, with mean diameters of 11 nm (σ = 2.8) and 14 nm (σ = 3.5), respectively. The mean diameter of the Ge nanowires grown from the fluorous-capped Au nanoparticles were considerably smaller than those synthesized from dodecanethiol-capped nanoparticles in sc-toluene, under the same reaction conditions, i.e., 28 nm and σ = 10.3. Differences in the ligand conformations on the surface of the Au nanoparticles and phase separation of the fluorocarbon/CO2 and hydrocarbon/toluene systems gave rise to greater steric stabilization of the fluorous-capped Au nanoparticles in CO2, resulting in small diameter nanowires with a relatively narrow size distribution. Electrical analysis of the nanowires showed them to be p-type (hole) semiconductors. en
dc.description.sponsorship Higher Education Authority (HEA Program for Research in Third Level Institutions (2007-2011) via the INSPIRE Programme) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Chemical Society (ACS) en
dc.relation.uri http://pubs.acs.org/doi/abs/10.1021/cm1012137
dc.rights © 2010 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/cm1012137 en
dc.subject Gold en
dc.subject Carbon dioxide en
dc.subject Electric wire en
dc.subject Germanium en
dc.subject Ligands en
dc.subject Nanoparticles en
dc.subject Nanowires en
dc.subject Phase separation en
dc.subject Pyrolysis en
dc.subject Supercritical fluid extraction en
dc.subject Synthesis (chemical) en
dc.subject Toluene en
dc.subject Germanium nanowires en
dc.title Germanium nanowire synthesis from fluorothiolate-capped gold nanoparticles in supercritical carbon dioxide en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Justin D. Holmes, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: j.holmes@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2018-08-06T15:26:25Z
dc.description.version Accepted Version en
dc.internal.rssid 50557658
dc.contributor.funder Irish Research Council for Science, Engineering and Technology en
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder Higher Education Authority en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Chemistry of Materials en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress j.holmes@ucc.ie en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Centre for Science Engineering and Technology (CSET)/08/CE/I1432/IE/CSET CRANN: 2nd Term funding/ en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Centre for Science Engineering and Technology (CSET) Supplement/08/CE/I1432s1/IE/CRANN supplement to promote industry engagement/ en


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