Structural origin of coiling in coiled carbon nanotubes

The statistical distribution of a large number of helically coiled carbon nanotubes was analyzed in a cross-correlated way in their geometrical configuration space defined by diameter and pitch. Stability islands were identified, in which the number of coils exceeds about 15–10 times the value corre...

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Bibliographic Details
Published in:Carbon (New York) 2005-07, Vol.43 (8), p.1628-1633
Main Authors: Szabó, A., Fonseca, A., B.Nagy, J., Lambin, Ph, Biró, L.P.
Format: Article
Language:English
Subjects:
Carbon nanotubes
Chemical vapor deposition
Cross-disciplinary physics: materials science
rheology
Defects
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Materials science
Modeling
Physics
Specific materials
Transmission electron microscopy
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Summary:The statistical distribution of a large number of helically coiled carbon nanotubes was analyzed in a cross-correlated way in their geometrical configuration space defined by diameter and pitch. Stability islands were identified, in which the number of coils exceeds about 15–10 times the value corresponding to a uniform distribution. When comparing our data with data from literature, a good agreement is found. The statistical findings are interpreted as indirect evidence that the geometric configuration of coiled carbon nanotubes is rather decided by the atomic structure of carbon layers building up the coils than by the external parameters which on the other hand may induce the particular conditions under which coiling occurs. The possible effect of impurities like N and S on the incorporation of non-hexagonal rings and tubular growth is pointed out.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2005.01.025