期刊
CARBON
卷 45, 期 11, 页码 2152-2158出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2007.07.001
关键词
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This study shows that S concentration in the Fe catalyst plays an important role in controlling the number of graphene layers during carbon nanotube (CNT) growth via chemical vapor deposition. Using different S concentrations, we have grown thin carbon nanotubes with from I to 5 layers. Single-walled carbon nanotubes growing from the active surface of an FeS-Fe eutectic were observed. A growth model basing on the HRTEM characterization and thermodynamic analysis is suggested in which the CNT nucleates and grows on the active surface area of the catalyst where S accumulates in the form of an FeS-Fe eutectic, and the S distribution on the catalyst particle surface determines the number of CNT layers. (c) 2007 Elsevier Ltd. All rights reserved.
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