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Droplet manipulation and horizontal growth of high-quality self-catalysed GaAsP nanowires

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Zhang, Yunyan, Sánchez, Ana M., Aagesen, Martin, Fonseka, H. Aruni, Huo, Suguo and Liu, Huiyun (2020) Droplet manipulation and horizontal growth of high-quality self-catalysed GaAsP nanowires. Nano Today, 34 . 100921. doi:10.1016/j.nantod.2020.100921

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Official URL: https://doi.org/10.1016/j.nantod.2020.100921

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Abstract

Self-catalyzed horizontal nanowires (NWs) can greatly simplify the CMOS integration processing compared with the regular vertical counterparts. However, self-catalyzed growth mode poses challenges in manipulating the droplets to produce single-crystalline horizontal NWs with a uniform diameter. Here, we demonstrated a novel method to manipulate the droplet through altering the droplet surface energy. Ga-droplet was successfully moved from top to sidewalls in GaAsP NWs by introducing Be and lowering the surface energy, and pinned at the tip despite the absence of planar defects. This can switch the <111> growth direction, with a successful rate of 100 %, from vertical to horizontal through the assistance of few sparse twins. The produced NWs tend to be bounded by low energy facets, which leads to the self-catalysed growth of horizontal NWs with a greatly improved diameter uniformity along the axis. Besides, the lowered surface energy can effectively suppress the wurtzite nucleation, producing pure zinc blende single-crystalline horizontal NWs. This study establishes an essential step toward the efficient integration of NWs into CMOS compatible devices.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Physics
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Nanowires, Surface energy, Drops
Journal or Publication Title: Nano Today
Publisher: Elsevier
ISSN: 1748-0132
Official Date: October 2020
Dates:
DateEvent
October 2020Published
7 July 2020Available
28 June 2020Accepted
Date of first compliant deposit: 3 September 2020
Volume: 34
Article Number: 100921
DOI: 10.1016/j.nantod.2020.100921
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDLeverhulme Trusthttp://dx.doi.org/10.13039/501100000275
EP/P000916/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/P000886/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
National Epitaxy Facility[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266

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