Surface Diffusion and Substrate−Nanowire Adatom Exchange in InAs Nanowire Growth
We report new fundamental insights into InAs nanowire (NW) nucleation and evolution on InAs (111)B surfaces using organometallic vapor phase epitaxy and present the first experimental demonstration of two distinct NW growth regimes, defined by the direction of substrate−NW adatom exchange, that lead...
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| Veröffentlicht in: | Nano letters 2009-05, Vol.9 (5), p.1967-1972 |
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| container_end_page | 1972 |
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| container_issue | 5 |
| container_start_page | 1967 |
| container_title | Nano letters |
| container_volume | 9 |
| creator | Dayeh, Shadi A Yu, Edward T Wang, Deli |
| description | We report new fundamental insights into InAs nanowire (NW) nucleation and evolution on InAs (111)B surfaces using organometallic vapor phase epitaxy and present the first experimental demonstration of two distinct NW growth regimes, defined by the direction of substrate−NW adatom exchange, that lead to nonlinear growth rates. We show that the NW elongation rate and morphology in these two growth regimes are governed by the relative difference between the In adatom diffusion lengths on the growth substrate surface and on the NW sidewalls, resulting in strong growth rate dependence on the NW length. These results indicate that surface solid−phase diffusion of In adatoms is a key process in InAs NW growth, which is also supported by diameter-dependent growth rates. These developments enable rational growth of axial and radial NW heterostructures. |
| doi_str_mv | 10.1021/nl900191w |
| format | Article |
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We show that the NW elongation rate and morphology in these two growth regimes are governed by the relative difference between the In adatom diffusion lengths on the growth substrate surface and on the NW sidewalls, resulting in strong growth rate dependence on the NW length. These results indicate that surface solid−phase diffusion of In adatoms is a key process in InAs NW growth, which is also supported by diameter-dependent growth rates. These developments enable rational growth of axial and radial NW heterostructures.</description><identifier>ISSN: 1530-6984</identifier><identifier>EISSN: 1530-6992</identifier><identifier>DOI: 10.1021/nl900191w</identifier><identifier>PMID: 19397297</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Equations of state, phase equilibria, and phase transitions ; Exact sciences and technology ; General studies of phase transitions ; Materials science ; Mechanical and acoustical properties of condensed matter ; Mechanical properties of nanoscale materials ; Nanocrystalline materials ; Nanoscale materials and structures: fabrication and characterization ; Nucleation ; Physics ; Quantum wires</subject><ispartof>Nano letters, 2009-05, Vol.9 (5), p.1967-1972</ispartof><rights>Copyright © 2009 American Chemical Society</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a409t-50142817326f9037f169b400bfd5da66f9d7cdcf39a45263b93ead428f413f593</citedby><cites>FETCH-LOGICAL-a409t-50142817326f9037f169b400bfd5da66f9d7cdcf39a45263b93ead428f413f593</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/nl900191w$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/nl900191w$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,780,784,2765,27076,27924,27925,56738,56788</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21495886$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19397297$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Dayeh, Shadi A</creatorcontrib><creatorcontrib>Yu, Edward T</creatorcontrib><creatorcontrib>Wang, Deli</creatorcontrib><title>Surface Diffusion and Substrate−Nanowire Adatom Exchange in InAs Nanowire Growth</title><title>Nano letters</title><addtitle>Nano Lett</addtitle><description>We report new fundamental insights into InAs nanowire (NW) nucleation and evolution on InAs (111)B surfaces using organometallic vapor phase epitaxy and present the first experimental demonstration of two distinct NW growth regimes, defined by the direction of substrate−NW adatom exchange, that lead to nonlinear growth rates. We show that the NW elongation rate and morphology in these two growth regimes are governed by the relative difference between the In adatom diffusion lengths on the growth substrate surface and on the NW sidewalls, resulting in strong growth rate dependence on the NW length. These results indicate that surface solid−phase diffusion of In adatoms is a key process in InAs NW growth, which is also supported by diameter-dependent growth rates. 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| subjects | Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Equations of state, phase equilibria, and phase transitions Exact sciences and technology General studies of phase transitions Materials science Mechanical and acoustical properties of condensed matter Mechanical properties of nanoscale materials Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Nucleation Physics Quantum wires |
| title | Surface Diffusion and Substrate−Nanowire Adatom Exchange in InAs Nanowire Growth |
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