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The structural evolution of thin multi-walled carbon nanotubes during isothermal annealing

被引：74
作者：
Chen, J.
Shan, J. Y.
Tsukada, T.
Munekane, F.
Kuno, A.
Matsuo, M.
Hayashi, T.
Kim, Y. A.
Endo, M.
机构：
[1] Nano Carbon Technol Co Ltd, Tokyo 1968522, Japan
[2] Univ Tokyo, Grad Sch Arts & Sci, Meguro Ku, Tokyo 1538902, Japan
[3] Shinshu Univ, Fac Engn, Nagano 3808533, Japan
来源：
CARBON | 2007年 / 45卷 / 02期
关键词：
D O I：
10.1016/j.carbon.2006.09.028
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Systematic isothermal annealing has been carried out on catalytic chemical vapor deposition-derived highly disordered multi-walled carbon nanotubes in order to understand the structural evolution of carbon nanotubes kinetically. After specified isothermal time the crystallographic parameters strongly depend on annealing temperature, and can be divided into three stages. Rapid structural enhancement in the range from 1800 to 2200 degrees C originates from the abrupt evolution of the residual catalytic compounds and is seen as partially aligned small fringes along the tube length. The lack of further structural ordering at temperatures above 2400 degrees C and the low activation energy (ca. 90 kJ/mol) are thought to be the result of the limited space available for further structural development considering the nanosized multi-walled carbon nanotubes. (c) 2006 Elsevier Ltd. All rights reserved.
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页码：274 / 280
页数：7
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