Quality control of GaAs nanowire structures by limiting as flux in molecular beam epitaxy

Zhou, Chen, Zheng, Kun, Lu, Zhenyu, Zhang, Zhi, Liao, Zhiming, Chen, Pingping, Lu, Wei and Zou, Jin (2015) Quality control of GaAs nanowire structures by limiting as flux in molecular beam epitaxy. Journal of Physical Chemistry C, 119 35: 20721-20727. doi:10.1021/acs.jpcc.5b05606


Author Zhou, Chen
Zheng, Kun
Lu, Zhenyu
Zhang, Zhi
Liao, Zhiming
Chen, Pingping
Lu, Wei
Zou, Jin
Title Quality control of GaAs nanowire structures by limiting as flux in molecular beam epitaxy
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7455
1932-7447
Publication date 2015-08-03
Year available 2015
Sub-type Article (original research)
DOI 10.1021/acs.jpcc.5b05606
Open Access Status Not yet assessed
Volume 119
Issue 35
Start page 20721
End page 20727
Total pages 7
Place of publication Washington, DC United States
Publisher American Chemical Society
Language eng
Abstract In this study, we demonstrate that by merely limiting the As flux, the growth behavior and structural quality of Au-catalyzed GaAs nanowires can be modulated in molecular beam epitaxy. With decreasing the As flux through lowering the V/III ratio, GaAs nanowire growth is found to be slow and defect-free wurtzite structured GaAs nanowires can be obtained regardless of catalyst sizes. While, in the As-enriched environment (such as at relatively high V/III ratio), thinner nanowires can grow longer with fewer planar defects. Based on our extensive morphological, structural, and compositional investigations, it is found that GaAs nanowires grown under an As-limited condition can lead to a thermodynamically controlled growth process, while, when the nanowires are grown under a relative high V/III ratio, a typical kinetically dominated process is observed. This study provides a new insight for controlling the structural quality of III–V nanowires by tuning the group-V flux.
Keyword Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 2011CB925604
61376015
13JC1405901
Institutional Status UQ

 
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