| Fast growth synthesis of GaAs nanowires with exceptional length. | |
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MedLine Citation:
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PMID: 20380477 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We report the first synthesis of GaAs nanowires (NWs) by Au-assisted vapor-liquid-solid (VLS) growth in the novel hydride vapor phase epitaxy (HVPE) environment. Forty micrometer long rodlike <111> monocrystalline GaAs nanowires exhibiting a cubic zinc blende structure were grown in 15 min with a mean density of 10(6) cm(-2). The synthesis of such long figures in such a short duration could be explained by the growth physics of near-equilibrium HVPE. VLS-HVPE is mainly based on solidification after direct and continuous feeding of the arsenious and GaCl growth precursors through the Au-Ga liquid catalyst. Fast solidification (170 microm/h) is then assisted by the high decomposition frequency of GaCl. This predominant feeding through the liquid-solid interface with no mass and kinetic hindrance favors axial rather than radial growth, leading to twin-free nanowires with a constant cylinder shape over unusual length. The achievement of GaAs NWs several tens of micrometers long showing a high surface to volume ratio may open the field of III-V wires, as already addressed with ultralong Si nanowires. |
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Authors:
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M R Ramdani; E Gil; Ch Leroux; Y André; A Trassoudaine; D Castelluci; L Bideux; G Monier; C Robert-Goumet; R Kupka |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Nano letters Volume: 10 ISSN: 1530-6992 ISO Abbreviation: Nano Lett. Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-05-13 Completed Date: 2010-09-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101088070 Medline TA: Nano Lett Country: United States |
Other Details:
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Languages: eng Pagination: 1836-41 Citation Subset: IM |
Affiliation:
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Clermont Université, Université Blaise Pascal, LASMEA, BP 10448, Clermont-Ferrand, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Arsenicals
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chemical synthesis* Crystallization / methods* Equipment Design Equipment Failure Analysis Gallium Macromolecular Substances / chemistry Materials Testing Molecular Conformation Nanostructures / chemistry*, ultrastructure* Nanotechnology / methods* Particle Size Surface Properties |
| Chemical | |
Reg. No./Substance:
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0/Arsenicals; 0/Macromolecular Substances; 1303-00-0/gallium arsenide; 7440-55-3/Gallium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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