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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
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 | |||||||||||||||
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| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| 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: |
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| 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: |
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