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Catalytic growth of CdTe nanowires by closed space sublimation method

Authors
Yang, GwangseokJung, YounghunChun, SeungjuKim, DonghwanKim, Jihyun
Issue Date
1-11월-2013
Publisher
ELSEVIER SCIENCE SA
Keywords
CdTe; Closed space sublimation method; Nanostructures
Citation
THIN SOLID FILMS, v.546, pp.375 - 378
Indexed
SCIE
SCOPUS
Journal Title
THIN SOLID FILMS
Volume
546
Start Page
375
End Page
378
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/101650
DOI
10.1016/j.tsf.2013.03.068
ISSN
0040-6090
Abstract
CdTe nano-/micro-structures with various morphologies were grown by using the closed space sublimation (CSS) method on a sapphire substrate by Au-catalyzed vapor-liquid-solid (VLS) mechanism. Length, diameter, and morphology of the CdTe nano-/micro-structures depended on the growth time and temperature gradient between the substrate and powdered CdTe source. Scanning electron microscopy images showed that an Au catalyst droplet existed at the tips of CdTe nanowires, which confirms that CdTe nanowires were grown by an Au-catalyzed VLS mechanism. Also, we observed that the two-dimensional CdTe film layer initially formed before the growth of the CdTe nano-/micro-wires. The optical and structural properties of CdTe nano-/micro-structures were characterized by X-ray diffraction technique and micro-Raman spectroscopy. Our study demonstrates that diverse CdTe nano-/micro-structures can be fabricated by using Au-catalyzed VLS growth process in a simple CSS chamber by controlling the temperature gradient and growth time. (C) 2013 Elsevier B.V. All rights reserved.
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KIM, Dong hwan
공과대학 (신소재공학부)
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