期刊
CHEMICAL PHYSICS LETTERS
卷 333, 期 6, 页码 509-514出版社
ELSEVIER
DOI: 10.1016/S0009-2614(00)01431-7
关键词
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Bamboo-shaped carbon nanotubes fabricated by the catalytic growth method with Ni/metallic oxide catalyst are systematically studied using transmission electron microscopy. It is found that except for the nodes the bamboo-shaped carbon nanotubes can be regarded as stacking of truncated conical graphene sheets. Depending on the size of a catalyst, the Ni particles can be encapsulated inside the tubes or at the growth front of the tubes with a plug-shape. A linear relationship between size of the nanotube and the catalyst particle is found. The results suggest that the nanometer-sized Ni catalyst particles are in the liquid state during nanotube growth. A simple model for the growth of bamboo-shaped nanotubes is proposed. (C) 2001 Elsevier Science B.V. All rights reserved.
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