Rotational dynamics and friction in double-walled carbon nanotubes


Servantie J. , GASPARD P.

PHYSICAL REVIEW LETTERS, vol.97, no.18, 2006 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 97 Issue: 18
  • Publication Date: 2006
  • Doi Number: 10.1103/physrevlett.97.186106
  • Title of Journal : PHYSICAL REVIEW LETTERS

Abstract

We report a study of the rotational dynamics in double-walled nanotubes using molecular dynamics simulations and a simple analytical model that reproduces the observations very well. We show that the dynamic friction is linear in the angular velocity for a wide range of values. The molecular dynamics simulations show that for large enough systems the relaxation time takes a constant value depending only on the interlayer spacing and temperature. Moreover, the friction force increases linearly with contact area and the relaxation time decreases with the temperature with a power law of exponent -1.53 +/- 0.04.