Nano Archive

How does a carbon nanotube grow? An in situ investigation on the cap evolution

Jin, Chuanhong and Suenaga, Kazu and Iijima, Surnio (2008) How does a carbon nanotube grow? An in situ investigation on the cap evolution. ACS NANO, 2 (6). pp. 1275-1279.

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Official URL: http://dx.doi.org/10.1021/nn800121v

Abstract

Catalyst-free inner growth of single-wall carbon nanotubes has been directly realized and monitored by means of in situ high-resolution transmission electron microscopy, with particular attention paid to the evolution of the cap shape. The cap of a carbon nanotube is surprisingly found to be kept closed during the growing/shrinking process, and the cap shape evolves inhomogeneously with a few particular sites growing faster during the growth, while the cap of a carbon nanotube keeps a round shape during the shrinkage process. The closed cap should be specific for noncatalytic growth of carbon nanotubes. We infer, from the results above, the possible atomistic mechanism and how the carbon network can accommodate or release the carbon atoms during the growth/shrinkage of carbon nanotubes.

Item Type:Article
Uncontrolled Keywords:carbon nanotube; noncatalytic inner growth; in situ transmission electron microscopy
Subjects:Analytical Science > Microscopy and probe methods
Physical Science > Nano objects
Material Science > Nanochemistry
ID Code:2964
Deposited By:Anuj Seth
Deposited On:12 Jan 2009 12:59
Last Modified:20 Jan 2009 12:05

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