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

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dc.contributor.authorCollins, Gillian
dc.contributor.authorKoleśnik-Gray, Maria M.
dc.contributor.authorKrstić, Vojislav
dc.contributor.authorHolmes, Justin D.
dc.contributor.funderIrish Research Council for Science, Engineering and Technologyen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderHigher Education Authorityen
dc.date.accessioned2018-08-30T10:49:09Z
dc.date.available2018-08-30T10:49:09Z
dc.date.issued2010-08-20
dc.date.updated2018-08-06T15:26:25Z
dc.description.abstractGe 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.sponsorshipHigher Education Authority (HEA Program for Research in Third Level Institutions (2007-2011) via the INSPIRE Programme)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCollins, 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/cm1012137en
dc.identifier.doi10.1021/cm1012137
dc.identifier.endpage5243en
dc.identifier.issn0897-4756
dc.identifier.journaltitleChemistry of Materialsen
dc.identifier.startpage5235en
dc.identifier.urihttps://hdl.handle.net/10468/6688
dc.identifier.volume22en
dc.language.isoenen
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Centre for Science Engineering and Technology (CSET)/08/CE/I1432/IE/CSET CRANN: 2nd Term funding/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Centre for Science Engineering and Technology (CSET) Supplement/08/CE/I1432s1/IE/CRANN supplement to promote industry engagement/en
dc.relation.urihttp://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/cm1012137en
dc.subjectGolden
dc.subjectCarbon dioxideen
dc.subjectElectric wireen
dc.subjectGermaniumen
dc.subjectLigandsen
dc.subjectNanoparticlesen
dc.subjectNanowiresen
dc.subjectPhase separationen
dc.subjectPyrolysisen
dc.subjectSupercritical fluid extractionen
dc.subjectSynthesis (chemical)en
dc.subjectTolueneen
dc.subjectGermanium nanowiresen
dc.titleGermanium nanowire synthesis from fluorothiolate-capped gold nanoparticles in supercritical carbon dioxideen
dc.typeArticle (peer-reviewed)en
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