Temperature-dependent growth of carbon nanotubes by pyrolysis of ferrocene and acetylene in the range between 700 and 1000°C

被引：127
作者：
Lee, YT
Kim, NS
Park, J [1 ]
Han, JB
Choi, YS
Ryu, H
Lee, HJ
机构：
[1] Korea Univ, Dept Chem, Jochiwon 339700, South Korea
[2] Korea Univ, Dept Chem, Seoul 136701, South Korea
[3] Korea Res Inst Stand & Sci, Taejon 305600, South Korea
来源：
CHEMICAL PHYSICS LETTERS | 2003年 / 372卷 / 5-6期
关键词：
D O I：
10.1016/S0009-2614(03)00529-3
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：
Aligned carbon nanotubes were grown by pyrolysis of ferrocene and acetylene in the temperature range 700-1000degreesC. The average diameter is constantly 20 run for all growth temperatures. As the temperature increases, the growth rate increases by 60 times. The length reaches up to 3 mm at 1000degreesC. These long carbon nanotubes exhibit a cylindrical structure. The relative amount of crystalline graphitic sheets increases significantly with the growth temperature. The Arrhenius plot yields the activation energy 35 +/- 3 kcal/mol, which is close to the diffusion energy of carbon in bulk gamma-Fe. We suggest that the bulk diffusion of carbons would play an important role in the growth of cylindrical structured carbon nanotubes. (C) 2003 Elsevier Science B.V. All rights reserved.
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页码：853 / 859
页数：7
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