Pseudoclimb and Dislocation Dynamics in Superplastic Nanotubes

Feng Ding, Kun Jiao, Mingqi Wu, and Boris I. Yakobson
Phys. Rev. Lett. 98, 075503 – Published 13 February 2007

Abstract

Plastic relaxation of carbon nanotubes under tension and at high temperature is described in terms of dislocation theory and with atomistic computer simulations. It is shown how the glide of pentagon-heptagon defects and a particular type of their pseudoclimb, with the atoms directly breaking out of the lattice, work concurrently to maintain the tube perfection. Derived force diagram quantifies the balance between these mechanisms, while simulations show both helical and longitudinal movement of the kinks, in agreement with the forces and with experimental observations.

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  • Received 28 March 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.075503

©2007 American Physical Society

Authors & Affiliations

Feng Ding, Kun Jiao, Mingqi Wu, and Boris I. Yakobson*

  • Department of Mechanical Engineering & Materials Science, and Department of Chemistry, Rice University, Houston, Texas 77005, USA

  • *Corresponding author. Electronic address: biy@rice.edu

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Issue

Vol. 98, Iss. 7 — 16 February 2007

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