Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 2, Pages 1957-1962Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2012.08.046
Keywords
SiC; Nanowires; Vapor-solid process; SiC-SiO2 core-shell structure
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Funding
- National Natural Science Foundation of China [51032007, 50972134]
- Fundamental Research Funds for the Central Universities [2010ZD12]
- New Star Technology Plan of Beijing [2007A080]
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In this paper, SiC nanowires were successfully synthesized on Si substrate by the thermal evaporation method without the assistance of a metal catalyst. The phase composition, morphology and microstructure of the SiC-SiO2 core-shell nanowires were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). The SiC nanowires produced grew along the [111] direction and had diameters of 50-100 nm with lengths of several hundreds of microns. The SiC nanowire was composed of a single-crystalline SiC core with a thin amorphous SiO2 shell. The growth mechanism of the nanowires can be explained by the vapor-solid (VS) process. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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