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Dislocations in carbon nanotube walls
journal contribution
posted on 2023-06-08, 07:10 authored by Irene Suarez-Martinez, Gianluca Savini, Alberto Zobelli, Malcolm HeggieWe present a novel interpretation of defected tubes based on a dislocation model. A scroll (a sheet rolled without closure) is considered as an axial edge dislocation in a multiwall nanotube (MWNT). Screw dislocation type defects separate scroll from nested-tubes within the same nanotube. The glide of the screw dislocation causes the transformation between these two forms. In some cases, the mechanism of formation of an MWNT could, therefore, start with the formation of a scroll which, by gliding of a screw dislocation, is transformed into the more stable MWNT. We compare the structure and energetics of prismatic screw and edge dislocations in graphite and carbon nanotubes. We present calculations for the Peierls barrier of the first kind for graphite and we discuss this result for glide motion of screw dislocations in nanotubes. There is no evidence for stable spa atoms in any of the studied nanostructures. Copyright
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Publication status
- Published
Journal
Journal of Nanoscience and NanotechnologyISSN
15334880Publisher
American Scientific PublishersExternal DOI
Issue
10Volume
7Page range
3417-3420Department affiliated with
- Chemistry Publications
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- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
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