Competition and cooperation between lattice-oriented growth and step-templated growth of aligned carbon nanotubes on sapphire

被引：57
作者：
Ago, Hiroki [1 ]
Imamoto, Kenta
Ishigami, Naoki
Ohdo, Ryota
Ikeda, Ken-ichi
Tsuji, Masaharu
机构：
[1] Kyushu Univ, Inst Mat Chem & Engn, Kasuga, Fukuoka 8168580, Japan
[2] Kyushu Univ, Grad Sch Engn Sci, Kasuga, Fukuoka 8168580, Japan
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 12期
关键词：
D O I：
10.1063/1.2715031
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The authors study the growth mechanism of single-walled carbon nanotubes (SWNTs) horizontally aligned on A-plane single crystal sapphire (1120) by making the controlled step/terrace structure. SWNT growth direction was sensitive to the surface geometry of the sapphire, and there was competition between two growth modes, lattice-oriented growth and step-templated growth. On the substrate with single-atomic steps, SWNTs aligned parallel to the (1120) direction as dominated by the lattice-oriented growth mode, while SWNTs aligned along the step edges when the double-atomic or higher steps were formed. Our findings have potential for the fabrication of designed architecture of SWNTs by combining these two growth modes. (c) 2007 American Institute of Physics.
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