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dc.contributor.authorGamalski, Andrew D
dc.contributor.authorPerea, Daniel E
dc.contributor.authorYoo, Jinkyoung
dc.contributor.authorLi, Nan
dc.contributor.authorOlszta, Matthew J
dc.contributor.authorColby, Robert
dc.contributor.authorSchreiber, Daniel K
dc.contributor.authorDucati, Caterina
dc.contributor.authorPicraux, S Tom
dc.contributor.authorHofmann, Stephan
dc.date.accessioned2015-04-14T11:01:29Z
dc.date.available2015-04-14T11:01:29Z
dc.date.issued2013-09-24
dc.identifier.citationGamalski AD, Perea DE, Yoo J, Li N, Olszta MJ, Colby R, Schreiber DK, Ducati C, Picraux ST, Hofmann S, ACS Nano 2013, 7 (9), 7689–7697, doi:10.1021/nn402208p
dc.identifier.issn1936-0851
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/247324
dc.description.abstractThe mechanisms and kinetics of axial Ge-Si nanowire heteroepitaxial growth based on the tailoring of the Au catalyst composition via Ga alloying are studied by environmental transmission electron microscopy combined with systematic ex situ CVD calibrations. The morphology of the Ge-Si heterojunction, in particular, the extent of a local, asymmetric increase in nanowire diameter, is found to depend on the Ga composition of the catalyst, on the TMGa precursor exposure temperature, and on the presence of dopants. To rationalize the findings, a general nucleation-based model for nanowire heteroepitaxy is established which is anticipated to be relevant to a wide range of material systems and device-enabling heterostructures.
dc.description.sponsorshipS.H. acknowledges funding from ERC grant InsituNANO (No. 279342). A.D.G. acknowledges funding from the Marshall Aid Commemoration Commission and the National Science Foundation. C.D. acknowledges funding from the Royal Society. A portion of the research was also performed using EMSL, a national scientific user facility sponsored by the Department of Energy’s (DOE) Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory (PNNL). PNNL is operated by Battelle for the U.S. DOE under Contract DE-AC05-76RL01830. We gratefully acknowledge the use of facilities within the LeRoy Eyring Center for Solid State Science at Arizona State University. This work was performed in part at CINT, a U.S. DOE, Office of Science User Facility. The research was funded in part by the Laboratory Directed Research and Development Program at LANL, an affirmative action equal opportunity employer operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S. DOE under Contract DE-AC52-06NA25396.
dc.languageEnglish
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.subjectnanowire
dc.subjectGe−Si heteroepitaxy
dc.subjectnucleation barrier
dc.subjectenvironmental transmission electron microscopy
dc.subjectAuGa catalyst alloy
dc.subjectdopants
dc.titleCatalyst composition and impurity-dependent kinetics of nanowire heteroepitaxy.
dc.typeArticle
dc.description.versionThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, 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/nn402208p. Gamalski AD, Perea DE, Yoo J, Li N, Olszta MJ, Colby R, Schreiber DK, Ducati C, Picraux ST, Hofmann S, ACS Nano 2013, 7 (9), 7689–7697, doi:10.1021/nn402208p
prism.endingPage7697
prism.number9
prism.publicationDate2013
prism.publicationNameACS Nano
prism.startingPage7689
prism.volume7
dc.rioxxterms.funderERC
dc.rioxxterms.funderMarshall Aid Commemoration Commission
dc.rioxxterms.funderNational Science Foundation
dc.rioxxterms.funderRoyal Society
dc.rioxxterms.funderDepartment of Energy
dc.rioxxterms.projectidInsituNANO (No. 279342)
dc.rioxxterms.projectidContract DE-AC52-06NA25396
dc.rioxxterms.projectidContract DE-AC05-76RL01830
rioxxterms.versionofrecord10.1021/nn402208p
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2013-08-05
dc.contributor.orcidDucati, Caterina [0000-0003-3366-6442]
dc.contributor.orcidHofmann, Stephan [0000-0001-6375-1459]
dc.identifier.eissn1936-086X
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEuropean Research Council (279342)
cam.issuedOnline2013-08-13
rioxxterms.freetoread.startdate2014-08-05


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