Millimeter-thick single-walled carbon nanotube forests: Hidden role of catalyst support

被引：188
|
作者：
Noda, Suguru
Hasegawa, Kei
Sugime, Hisashi
Kakehi, Kazunori
Zhang, Zhengyi
Maruyama, Shigeo
Yamaguchi, Yukio
机构：
[1] Univ Tokyo, Sch Engn, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan
[2] Univ Tokyo, Sch Engn, Dept Engn Mech, Bunkyo Ku, Tokyo 1138656, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2007年 / 46卷 / 17-19期
关键词：
single-walled carbon nanotubes; vertically aligned nanotubes; combinatorial method; growth mechanism;
D O I：
10.1143/JJAP.46.L399
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A parametric study of so-called "super growth" of single-walled carbon nanotubes (SWNTs) was done by using combinatorial libraries of iron/aluminum oxide catalysts. Milli meter-thick forests of nanotubes grew within 10 min, and those grown by using catalysts with a thin Fe layer (about 0.5 nm) were SWNTs. Although nanotube forests grew under a wide range of reaction conditions such as gas composition and temperature, the window for SWNT was narrow. Fe catalysts rapidly grew nanotubes only when supported on aluminum oxide. Aluminum oxide, which is a well-known catalyst in hydrocarbon reforming, plays an essential role in enhancing the nanotube growth rates.
引用
收藏
页码：L399 / L401
页数：3
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