Metallic conductivity in bamboo-shaped multiwalled carbon nanotubes

被引:48
|
作者
Jang, JW
Lee, DK
Lee, CE [1 ]
Lee, TJ
Lee, CJ
Noh, SJ
机构
[1] Korea Univ, Dept Phys, Seoul 136701, South Korea
[2] Kunsan Natl Univ, Sch Elect Engn, Kunsan 573701, South Korea
[3] Dankook Univ, Dept Appl Phys, Seoul 140714, South Korea
基金
新加坡国家研究基金会;
关键词
carbon nanotubes; thermal chemical vapor deposition; scanning and transmission electron microscopy; electronic transport;
D O I
10.1016/S0038-1098(02)00153-9
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Temperature-dependent resistivity measurements were carried out on bamboo-shaped multiwalled carbon nanotubes (MWNTs) grown by thermal chemical vapor deposition. They were deposited on Al2O3/Ti and SiO2/Ti substrates using cobalt and iron catalysts, respectively. As a result, a metallic conductivity, i.e. resistivities with a positive temperature slope, was observed for the MWNTs grown on the SiO2/Ti substrates. The different temperature behaviors of the resistivity for the MWNTs grown on different substrates are discussed in view of the substrate morphology and crystallinity. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:619 / 622
页数:4
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