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Paper   IPM / Physic / 8968
School of Physics
  Title:   Formation of Atomic Nanoclusters on Graphene Sheets
  Author(s): 
1.  M. Neek-Amal
2.  R. Asgari
3.  M.R. Rahimi Tabar
  Status:   Published
  Journal: Nanotech.
  Vol.:  20
  Year:  2009
  Pages:   135602
  Supported by:  IPM
  Abstract:
The formation of atomic nanoclusters on suspended graphene sheets have been investigated by employing a Molecular dynamics simulation at finite temperature. Our systematic study is based on temperature dependent Molecular dynamics simulations of some transition and alkali atoms on suspended graphene sheets. We find that the transition atoms aggregate and make various size nanoclusters distributed randomly on graphene surface. We also report that most alkali atoms make one atomic layer on graphene sheets. Interestingly, the potassium atoms almost deposit regularly on the surface at low temperature. We predict from this behavior that the electrical conductivity of a suspended graphene doped by potassium atoms would be much higher than the case doped by the other atoms at low temperature.

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