期刊
DIAMOND AND RELATED MATERIALS
卷 16, 期 4-7, 页码 1078-1081出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2007.01.004
关键词
carbon nanotube; SiC; STM; XPS
The effects of oxygen on the early stage of carbon nanocap and nanotube growth by surface decomposition of 6H-SiC(000-1) were investigated, using scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). Our results showed that the presence of oxygen enhances the decomposition of the SiC surface, promoting carbon nanocap and nanotube growth. We also observed active-to-passive oxidation transition below 10(-1) Pa, which is consistent with the pressure-temperature phase diagram previously estimated from experimental results above 10(-1) Pa. (c) 2007 Elsevier B.V. All rights reserved.
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