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

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dc.contributor.author Barth, Sven
dc.contributor.author Koleśnik-Gray, Maria M.
dc.contributor.author Donegan, Keith P.
dc.contributor.author Krstić, Vojislav
dc.contributor.author Holmes, Justin D.
dc.date.accessioned 2018-09-19T08:57:18Z
dc.date.available 2018-09-19T08:57:18Z
dc.date.issued 2011-06-30
dc.identifier.citation Barth, 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/cm200646e en
dc.identifier.volume 23 en
dc.identifier.startpage 3335 en
dc.identifier.endpage 3340 en
dc.identifier.issn 0897-4756
dc.identifier.uri http://hdl.handle.net/10468/6808
dc.identifier.doi 10.1021/cm200646e
dc.description.abstract Despite 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.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 https://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/cm200646e en
dc.subject Germanium en
dc.subject Nanowire en
dc.subject Nickel en
dc.subject SFSS en
dc.subject Solid-phase-seeding en
dc.title Diameter-controlled solid-phase seeding of germanium nanowires: structural characterization and electrical transport properties 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 2018-08-06T14:58:23Z
dc.description.version Accepted Version en
dc.internal.rssid 95057137
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 Research Frontiers Programme (RFP)/07/RFP/MASF710/IE/Nanocable Arrays for Future Electronics/ 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 Principal Investigator Programme (PI)/08/IN.1/I1873/IE/One dimensional Nano-spintronics with Non-magnetic nanowires/ en

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