Diffusive motion of C60 on a graphene sheet

Details Diffusive motion of C60 on a graphene sheet Diffusive motion of C60 on a graphene sheet

2009-12-02

arxiv.org/abs/0912.0436v1

Phys. Rev. E 82, 051605 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 11 figures

Scientific paper

The motion of a C60 molecule over a graphene sheet at finite temperature is investigated both theoretically and computationally. We show that a graphene sheet generates a van der Waals laterally periodic potential, which directly influences the motion of external objects in its proximity. The translational motion of a C60 molecule near a graphene sheet is found to be diffusive in the lateral directions. While, in the perpendicular direction, the motion may be described as diffusion in an effective harmonic potential which is determined from the distribution function of the position of the C60 molecule. We also examine the rotational diffusion of C60 and show that its motion over the graphene sheet is not a rolling motion.

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