Atomic-resolution imaging of the nucleation points of single-walled carbon nanotubes

被引:86
作者
Zhu, HW [1 ]
Suenaga, K
Hashimoto, A
Urita, K
Hata, K
Iijima, S
机构
[1] Louisiana State Univ, Dept Elect & Comp Engn, Baton Rouge, LA 70803 USA
[2] Louisiana State Univ, Ctr Comp & Technol, Baton Rouge, LA 70803 USA
[3] AIST, Tsukuba, Ibaraki 3058565, Japan
关键词
carbon nanotubes; chirality; nucleation; template synthesis;
D O I
10.1002/smll.200500200
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The determination of the atomic structures of nucleation points for SWNTs and the analysis of the effects of SWNT-catalyst interactions on SWNT growth, was investigated. The atomic information in the nucleation points of SWNTs was obtained through a rational substrate preparation approach and atomic-resolution transmission electron microscopy. Catalytic cobalt nanoparticles were directly synthesized on SiO2 nanoballs located on a TEM copper grid. 50 mm thick SiO2 nanoballs were deposited on the carbon-film covered copper grid, and a 30 mm thick SiO2 film was sputtered on them using a conventional vacuum evaporator. Thermal annealing converted the Co thin film to metal nanoparticles. The observed growth pathway of SWNTs demonstrated that the relevant step sites were generated during the CVD reaction. The future aspects involve performing an in situ dynamic study of SWNT growth under more realistic conditions using environmental TEM.
引用
收藏
页码:1180 / 1183
页数:4
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