期刊
CERAMICS INTERNATIONAL
卷 40, 期 3, 页码 4455-4460出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.08.118
关键词
6H-SiC nanowire; Microstructure; Growth mechanism
资金
- National Natural Science Foundation of China [51221001, 51272212, 51275417]
- 111 Project [B08040]
- Foundation for the Author of National Excellent Doctoral Dissertation of China [201036]
Periodically twinned 6H-SiC nanowires with fluctuating stems were successfully synthesized on SiC substrate by chemical vapor deposition with ferrocene as the catalyst. The morphology and structures of the products were systematically characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results showed that the nanowires consisted of periodically twinned segments and presented stem-fluctuating morphology, whose diameters fluctuated in the range of 10-150 nm along the axial direction. A model based on vapor liquid solid mechanism was proposed to explain the growth of periodically twinned SiC nanowires with fluctuating stems, which revealed that the alternating high-density stacking faults facilitated the formation of stem-fluctuating morphology. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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