Giant Wave-Drag Enhancement of Friction in Sliding Carbon Nanotubes

Details Giant Wave-Drag Enhancement of Friction in Sliding Carbon Nanotubes Giant Wave-Drag Enhancement of Friction in Sliding Carbon Nanotubes

2006-07-03

arxiv.org/abs/cond-mat/0607049v1

Physics

Condensed Matter

Materials Science

Submitted to Phys. Rev. Lett. ; Presented at APS March Meeting 2006 (Paul Tangney, Bull. A.P.S. 51, 2006)

Scientific paper

10.1103/PhysRevLett.97.195901

Molecular dynamics simulations of coaxial carbon nanotubes in relative sliding motion reveal a striking enhancement of friction when phonons whose group velocity is close to the sliding velocity of the nanotubes are resonantly excited. The effect is analogous to the dramatic increase in air drag experienced by aircraft flying close to the speed of sound, but differs in that it can occur in multiple velocity ranges with varying magnitude, depending on the atomic level structures of the nanotubes. The phenomenon is a general one that may occur in other nanoscale mechanical systems.

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