Oct 5 – 10, 2014
Capri-Naples, Italy
Europe/Rome timezone

PS3-21 Interaction of Ions with Graphene on a Substrate

Oct 9, 2014, 5:00 PM
1h 30m
Hotel La Residenza

Hotel La Residenza


Mr Aleksei Ivanov (Russian)


In this paper analyzes the process of dynamic screening of external charges, moving over the surface of graphene disposed on a substrate. We are considered here relatively slow ions with velocities from thermal speeds to Bohr velocity. We explore here the effects of dynamic polarization of graphene on a substrate by ion motion parallel to its surface. We limited the study of the effects associated with the presence of an insulating substrate, such as , with a dielectric constant of . Ishigami et al. [1] have found that the distance h between graphene and substrate is on the order of the distance between graphene layers in graphite or even larger. Only (according to our information) in the paper [2] considered the effects of finite h. Our principal goal was to demonstrate how strong are the effects of finite h on the degree of dynamic polarization of graphene moving ions. This meant the need to include the gap size graphene-substrate as a parameter in modeling phenomena screening graphene. The simulation was performed by molecular dynamics using ReaxFF potential of free package for classical molecular dynamics LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator). References [1] M. Ishigami, J.H. Chen, W.G. Cullen, M.S. Fuhrer, E.D. Nano Lett. (2007) 7, 1643. [2] I. Radović, Lj. Hadžievski PHYSICAL REVIEW (2008) 77, 075428.

Primary author

Mr Aleksei Ivanov (Russian)

Presentation materials

There are no materials yet.