Carbon nanotube closed-ring structures

Oded Hod, Eran Rabani, Roi Baer

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


We study the structure and stability of closed-ring carbon nanotubes using a theoretical model based on the Brenner-Tersoff potential. Many metastable structures can be produced. We focus on two methods of generating such structures. In the first, a ring is formed by geometric folding and is then relaxed into minimum energy using a minimizing algorithm. Short tubes do not stay closed. Yet tubes longer than 18 nm are kinetically stable. The other method starts from a straight carbon nanotube and folds it adiabatically into a closed-ring structure. The two methods give strikingly different structures. The structures of the second method are more stable and exhibit two buckles, independent of the nanotube length. This result is in strict contradiction to an elastic shell model. We analyze the results for the failure of the elastic model.

Original languageAmerican English
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number19
StatePublished - 14 May 2003


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