Collapse of double-walled carbon nanotube bundles under hydrostatic pressure

Vikram Gadagkar, Prabal K. Maiti, Yves Lansac, A. Jagota, and A. K. Sood
Phys. Rev. B 73, 085402 – Published 2 February 2006

Abstract

We use classical molecular dynamics simulations to study the collapse of single (SWNT) and double-walled (DWNT) carbon nanotube bundles under hydrostatic pressure. The collapse pressure (pc) varies as 1R3, where R is the SWNT radius or the DWNT effective radius. The bundles show 30% hysteresis and the hexagonally close packed lattice is completely restored on decompression. The pc of DWNT is found to be close to the sum of its values for the inner and the outer tubes considered separately as SWNT, demonstrating that the inner tube supports the outer tube and that the effective bending stiffness of DWNT, DDWNT2DSWNT. We use an elastica formulation to derive the scaling and the collapse behavior of DWNT and multiwalled carbon nanotubes.

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  • Received 28 September 2005

DOI:https://doi.org/10.1103/PhysRevB.73.085402

©2006 American Physical Society

Authors & Affiliations

Vikram Gadagkar1, Prabal K. Maiti2,*, Yves Lansac3, A. Jagota4, and A. K. Sood1,*

  • 1Department of Physics, Indian Institute of Science, Bangalore 560012, India
  • 2Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
  • 3LEMA, UMR 6157 CNRS-CEA, Université François Rabelais, 37200 Tours, France
  • 4Department of Chemical Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA

  • *Corresponding author. Email address: asood@physics.iisc.ernet.in or maiti@physics.iisc.ernet.in

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Issue

Vol. 73, Iss. 8 — 15 February 2006

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