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Diffusive motion of C60 on a graphene sheet

Neek Amal, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevE.82.051605
  3. Publisher: 2010
  4. Abstract:
  5. 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 C 60 and show that its motion over the graphene sheet is not a rolling motion
  6. Keywords:
  7. Diffusive motions ; Finite temperatures ; Graphene sheets ; Harmonic potential ; Lateral directions ; Periodic potentials ; Rolling motion ; Rotational diffusion ; Translational motions ; Van der waals ; Distribution functions ; Harmonic functions ; Molecules ; Van der Waals forces ; Graphene
  8. Source: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics ; Volume 82, Issue 5 , November , 2010 ; 15393755 (ISSN)
  9. URL: http://journals.aps.org/pre/abstract/10.1103/PhysRevE.82.051605