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Paper   IPM / Physic / 11595
School of Physics
  Title:   Diffusive Motion of C60 on a Graphene Sheet
1.  M. Neek-Amal
2.  N. Abedpour
3.  S.N. Rasuli
4.  A. Naji
5.  M.R. Ejtehadi
  Status:   Published
  Journal: Phys. Rev. E
  Vol.:  82
  Year:  2010
  Pages:   051605
  Supported by:  IPM
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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