CUED Publications database

High purity GaAs nanowires free of planar defects: Growth and characterization

Joyce, HJ and Gao, Q and Tan, HH and Jagadish, C and Kim, Y and Fickenscher, MA and Perera, S and Hoang, TB and Smith, LM and Jackson, HE and Yarrison-Rice, JM and Zhang, X and Zou, J (2008) High purity GaAs nanowires free of planar defects: Growth and characterization. Advanced Functional Materials, 18. pp. 3794-3800. ISSN 1616-301X

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Abstract

We investigate how to tailor the structural, crystallographic and optical properties of GaAs nanowires. Nanowires were grown by Au nanoparticle-catalyzed metalorganic chemical vapor deposition. A high arsine flow rate, that is, a high ratio of group V to group III precursors, imparts significant advantages. It dramatically reduces planar crystallographic defects and reduces intrinsic carbon dopant incorporation. Increasing V/III ratio further, however, instigates nanowire kinking and increases nanowire tapering. By choosing an intermediate V/III ratio we achieve uniform, vertically aligned GaAs nanowires, free of planar crystallographic defects, with excellent optical properties and high purity. These findings will greatly assist the development of future GaAs nanowire-based electronic and optoelectronic devices, and are expected to be more broadly relevant to the rational synthesis of other III-V nanowires. © 2008 WILEY-VCH Verlag GmbH & Co. KGaA.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:46
Last Modified: 08 Dec 2014 02:18
DOI: 10.1002/adfm.200800625