期刊
JOURNAL OF CRYSTAL GROWTH
卷 407, 期 -, 页码 25-30出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2014.09.004
关键词
Backscattered electron; Core-shell nanovvires; HWCVD; Ni nanoparticles; Si/SiC
资金
- Ministry of Higher Education of Malaysia, Exploratory Research Grant Scheme (ERGS) [ER003-2013A]
- University of Malaya Research Grant (UMRG) Program [RP007B-13AFR]
Si/SiC core-shell nanowires grown on glass substrates by hot-wire chemical vapor deposition were studied. Nickel was used as a catalyst to initiate the growth of these core-shell nanowires and the nanowires were grown at different deposition pressures of 0.5 and 1 mbar. The core of the nanowire was found to be a single crystalline Si. The shell of the nanowire consisted of Si nano-crystallites embedded within an amorphous SiC matrix which was attributed to a radial growth of columnar structures. The Si and SiC nano-crystallites embedded within an amorphous matrix exhibited room-temperature photoluminescence emissions in the range of 400 nm-1 mu m. A vapor-solid-solid growth mechanism of these core-shell nanowires is proposed. The effects of the deposition pressure on the properties of the core-shell nanowires are also discussed. (C) 2014 Elsevier B.V. All rights reserved.
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