Synthesis of vertically aligned single- and double-walled carbon nanotubes without etching agents

被引:33
|
作者
Kayastha, Vijaya Kumar [1 ]
Wu, Shun [1 ]
Moscatello, Jason [1 ]
Yap, Yoke Khin [1 ]
机构
[1] Michigan Technol Univ, Dept Phys, Houghton, MI 49931 USA
来源
JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 28期
关键词
D O I
10.1021/jp073551l
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
The number of graphene shells on carbon nanotubes (CNTs) can be rationally controlled to yield high-density, vertically aligned single- and double-walled CNTs. This was obtained by thermal chemical vapor deposition at 700 degrees C without the use of etching agents such as water, oxygen, or plasma. The key factors for this success are controlled dissociative adsorption of acetylene (C2H2) molecules and subnanometer thickness control of the Al/Fe/Mo trilayer films. We propose that an Al concave meniscus confines the actual growth surface areas of Fe/Mo catalytic nanoparticles and enables the control of the number of graphene shells on CNTs.
引用
收藏
页码:10158 / 10161
页数:4
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