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Influence of droplet size on the growth of self-catalyzed ternary GaAsP nanowires

Zhang, Y; Sanchez, AM; Sun, Y; Wu, J; Aagesen, M; Huo, S; Kim, D; ... Liu, H; + view all (2016) Influence of droplet size on the growth of self-catalyzed ternary GaAsP nanowires. Nano Letters , 16 (2) pp. 1237-1243. 10.1021/acs.nanolett.5b04554. Green open access

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Abstract

The influences of droplet size on the growth of self-catalyzed ternary nanowires (NWs) were studied using GaAsP NWs. The size-induced Gibbs–Thomson (GT) effect makes the smaller catalytic droplets have lower effective supersaturations and hence slower nucleation rates than the larger ones. Large variation in droplet size thus led to the growth of NWs with low uniformity, while a good size uniformity of droplets resulted in the production of highly uniform NWs. Moreover, thinner NWs were observed to be richer in P, indicating that P is more resistant to the GT effect than As because of a higher chemical potential inside Ga droplets. These results provide useful information for understanding the mechanisms of self-catalyzed III–V NW nucleation and growth with the important ternary III–V material systems.

Type: Article
Title: Influence of droplet size on the growth of self-catalyzed ternary GaAsP nanowires
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acs.nanolett.5b04554
Publisher version: http://dx.doi.org/10.1021/acs.nanolett.5b04554
Language: English
Additional information: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.nanolett.5b04554.
Keywords: Nanowire; droplet size; self−catalyzed; Gibbs−Thomson effect; GaAsP; uniformity; chemical potential
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1473730
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