Au impact on GaAs epitaxial growth on GaAs (111)B substrates in molecular beam epitaxy

Liao, Zhi-Ming and Chen, Zhi-Gang and Lu, Zhen-Yu and Xu, Hong-Yi and Guo, Ya-Nan and Sun, Wen and Zhang, Zhi and Yang, Lei and Chen, Ping-Ping and Lu, Wei and Zou, Jin (2013) Au impact on GaAs epitaxial growth on GaAs (111)B substrates in molecular beam epitaxy. Applied Physics Letters, 102 (6). ISSN 0003-6951

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Abstract

GaAs growth behaviour under the presence of Au nanoparticles on GaAs {111}B substrate is investigated using electron microscopy. It has been found that, during annealing, enhanced Ga surface diffusion towards Au nanoparticles leads to the GaAs epitaxial growth into {113}B faceted triangular pyramids under Au nanoparticles, governed by the thermodynamic growth, while during conventional GaAs growth, growth kinetics dominates, resulting in the flatted triangular pyramids at high temperature and the epitaxial nanowires growth at relatively low temperature. This study provides an insight of Au nanoparticle impact on GaAs growth, which is critical for understanding the formation mechanisms of semiconductor nanowires.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: No Faculty
Date Deposited: 19 Jun 2017 03:24
Last Modified: 19 Jun 2017 03:24
Uncontrolled Keywords: Au nanoparticle; formation mechanism; GaAs; GaAs(111); growth behaviour; high temperature; low temperatures; semiconductor nanowire; crystal growth; solid state physics; coatings and finishes; chemical products generally; chemistry; nanotechnology; single element semiconducting materials; semiconducting materials; electric and magnetic materials; precious metals; bioengineering
Fields of Research : 03 Chemical Sciences > 0399 Other Chemical Sciences > 039999 Chemical Sciences not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1063/1.4792053
URI: http://eprints.usq.edu.au/id/eprint/31716

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