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Graphitic platform for self-catalysed InAs nanowires growth by molecular beam epitaxy
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Zhuang, Qian D., Anyebe, Ezekiel A., Sánchez, Ana M., Rajpalke, Mohana K., Veal, T. D. (Tim D.), Zhukov, Alexander, Robinson, Benjamin J., Anderson, Frazer, Kolosov, Oleg and Fal’ko, Vladimir (2014) Graphitic platform for self-catalysed InAs nanowires growth by molecular beam epitaxy. Nanoscale Research Letters, Volume 9 (Number 1). Article number 321. doi:10.1186/1556-276X-9-321 ISSN 1556-276X.
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Official URL: http://dx.doi.org/10.1186/1556-276X-9-321
Abstract
We report the self-catalysed growth of InAs nanowires (NWs) on graphite thin films using molecular beam epitaxy via a droplet-assisted technique. Through optimising metal droplets, we obtained vertically aligned InAs NWs with highly uniform diameter along their entire length. In comparison with conventional InAs NWs grown on Si (111), the graphite surface led to significant effects on the NWs geometry grown on it, i.e. larger diameter, shorter length with lower number density, which were ascribed to the absence of dangling bonds on the graphite surface. The axial growth rate of the NWs has a strong dependence on growth time, which increases quickly in the beginning then slows down after the NWs reach a length of approximately 0.8 μm. This is attributed to the combined axial growth contributions from the surface impingement and sidewall impingement together with the desorption of adatoms during the diffusion. The growth of InAs NWs on graphite was proposed following a vapour-solid mechanism. High-resolution transmission electron microscopy reveals that the NW has a mixture of pure zinc-blende and wurtzite insertions.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TN Mining engineering. Metallurgy T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Library of Congress Subject Headings (LCSH): | Nanowires, Graphite, Molecular beam epitaxy | ||||||||
Journal or Publication Title: | Nanoscale Research Letters | ||||||||
Publisher: | Springer | ||||||||
ISSN: | 1556-276X | ||||||||
Official Date: | 25 June 2014 | ||||||||
Dates: |
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Volume: | Volume 9 | ||||||||
Number: | Number 1 | ||||||||
Article Number: | Article number 321 | ||||||||
DOI: | 10.1186/1556-276X-9-321 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 27 December 2015 | ||||||||
Date of first compliant Open Access: | 27 December 2015 | ||||||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), Lancaster Impact Acceleration Account, European Graphene Flagship Project | ||||||||
Grant number: | EP/C001699/1 (EPSRC) |
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