Diameter-controlled solid-phase seeding of germanium nanowires: structural characterization and electrical transport properties

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dc.contributor.authorBarth, Sven
dc.contributor.authorKoleśnik-Gray, Maria M.
dc.contributor.authorDonegan, Keith P.
dc.contributor.authorKrstić, Vojislav
dc.contributor.authorHolmes, Justin D.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderHigher Education Authorityen
dc.date.accessioned2018-09-19T08:57:18Z
dc.date.available2018-09-19T08:57:18Z
dc.date.issued2011-06-30
dc.date.updated2018-08-06T14:58:23Z
dc.description.abstractDespite the huge progress recently made in understanding the phenomena of metal-promoted growth of one-dimensional (1D) semiconductors, the controlled formation of small diameter semiconductor nanowires is still challenging. Liquid growth promoters, such as the low melting Au/Ge eutectic, allow control of the aspect ratio, diameter, and structure of 1D crystals via external parameters, such as precursor feedstock, temperature, and operating pressure. However, the incorporation of metal atoms during the growth process, size variations of the nanowires due to agglomeration of the nucleating metal seeds, and surface diffusion of Au via the vapor–liquid–solid route have been reported. Here, we detail the influence of solid growth seeds, such as NiGe2 formed from Ni nanoparticles, on the lateral dimensions of Ge nanowires grown using a supercritical fluid growth process. Beneficial control over the mean nanowire diameter, in the sub-20 nm regime, with a predominantly ⟨110⟩ growth direction and low structural defect concentration was obtained using Ni seeds. In addition, the effect of prealloying of Ni–Fe films for the growth of Ge nanowires was investigated, which leads to a bimodal nanowire distribution. Electrical characterization performed on single nanowire devices showed p-type behavior for Ge nanowires grown from Ni and Ni/Fe seeds. Determination of resistivities, majority carrier concentrations, and mobilities suggest significant doping of the Ge nanowires by Ni when grown via a supercritical fluid–solid–solid (SFSS) mechanism.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.citationBarth, S., Koleśnik, M. M., Donegan, K., Krstić, V. and Holmes, J. D. (2011) 'Diameter-Controlled Solid-Phase Seeding of Germanium Nanowires: Structural Characterization and Electrical Transport Properties', Chemistry of Materials, 23(14), pp. 3335-3340. doi:10.1021/cm200646een
dc.identifier.doi10.1021/cm200646e
dc.identifier.endpage3340en
dc.identifier.issn0897-4756
dc.identifier.journaltitleChemistry of Materialsen
dc.identifier.startpage3335en
dc.identifier.urihttps://hdl.handle.net/10468/6808
dc.identifier.volume23en
dc.language.isoenen
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Frontiers Programme (RFP)/07/RFP/MASF710/IE/Nanocable Arrays for Future Electronics/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 Principal Investigator Programme (PI)/08/IN.1/I1873/IE/One dimensional Nano-spintronics with Non-magnetic nanowires/en
dc.relation.urihttps://pubs.acs.org/doi/abs/10.1021/cm200646e
dc.rights© 2011 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 https://pubs.acs.org/doi/abs/10.1021/cm200646een
dc.subjectGermaniumen
dc.subjectNanowireen
dc.subjectNickelen
dc.subjectSFSSen
dc.subjectSolid-phase-seedingen
dc.titleDiameter-controlled solid-phase seeding of germanium nanowires: structural characterization and electrical transport propertiesen
dc.typeArticle (peer-reviewed)en
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