|Growth of double-walled carbon nanotubes from silicon oxide nanoparticles|
|T. Y. Liu; L. L. Zhang; W. J. Yu; S. S. Li; P. X. Hou; H. T. Cong; C. Liu; H. M. Cheng
|Abstract||Double-walled carbon nanotubes (DWCNTs) were synthesized by a metal-catalyst-free chemical vapor deposition method using silicon oxide nanoparticles as a catalyst. The diameters and lengths of the DWCNTs are in the ranges of 3-5 nm and 1-5 mu m, respectively. The amount of DWCNTs produced is about 70%, while the remainder is single-walled carbon nanotubes. A heat treatment of the SiO2/Si substrate used was found to be crucial for controlling the size of the catalyst nanoparticles, and hence for the growth of the DWCNTs. Flat or cone-shaped caps were observed for the DWCNTs, indicating that the growth of the DWCNTs from the non-metal catalyst follows a vapor-solid-solid mechanism. Energy dispersive spectroscopy and X-ray photoelectron spectroscopy characterizations confirmed that no metal impurity exists in the obtained DWCNT samples. (C) 2013 Elsevier Ltd. All rights reserved.|
; zhang, li-li
; yu, wan-jing
; li, shi-sheng
; hou, peng-xiang
; cong, hong-tao
; liu, chang
; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.
; liu, c (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china.
T. Y. Liu,L. L. Zhang,W. J. Yu,et al. Growth of double-walled carbon nanotubes from silicon oxide nanoparticles[J]. Carbon,2013,56:167-172.
T. Y. Liu.,L. L. Zhang.,W. J. Yu.,S. S. Li.,P. X. Hou.,...&H. M. Cheng.(2013).Growth of double-walled carbon nanotubes from silicon oxide nanoparticles.Carbon,56,167-172.
T. Y. Liu,et al."Growth of double-walled carbon nanotubes from silicon oxide nanoparticles".Carbon 56(2013):167-172.
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