Load transfer between cross-linked walls of a carbon nanotube

Alexandre F. Fonseca, Tammie Borders, Ray H. Baughman, and Kyeongjae Cho
Phys. Rev. B 81, 045429 – Published 28 January 2010

Abstract

Cross links between inner and outer walls of multiwalled carbon nanotubes are believed to increase nanotube modulus and therefore nanotube effectiveness for reinforcing composites. In order to investigate changes in the Young’s modulus of individual double-walled nanotubes (DWNTs) as a function of cross-link density and type, molecular-dynamics simulations are employed to evaluate strain coupling and corresponding load transfer from outer to inner walls. Results show that interwall sp3 bonds and interstitial carbon atoms can increase load transfer between DWNT walls and that interwall sp3 bonds are most effective. However, the maximum size of the modulus increase is limited to about 25% for the investigated small-diameter, short DWNTs because the defects decrease the stiffnesses of the nanotube walls.

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  • Received 26 August 2009

DOI:https://doi.org/10.1103/PhysRevB.81.045429

©2010 American Physical Society

Authors & Affiliations

Alexandre F. Fonseca1,*, Tammie Borders2,†, Ray H. Baughman3,‡, and Kyeongjae Cho1,4,§

  • 1Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080, USA
  • 2Department of Chemistry, University of North Texas, Denton, Texas 76203, USA
  • 3The Alan G. MacDiarmid NanoTech Institute and the Department of Chemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA
  • 4Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, USA

  • *afonseca@puvr.uff.br. Present address: Pólo Universitário de Volta Redonda, Universidade Federal Fluminense, Av. dos Trabalhadores 420, Volta Redonda, RJ, Brazil, CEP:27255-125.
  • tammie.l.borders@lmco.com
  • ray.baughman@utdallas.edu
  • §kjcho@utdallas.edu

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Issue

Vol. 81, Iss. 4 — 15 January 2010

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