Applying Energy(ev per atom)

Hello dear lammps users,

in some papers about fabrication of nanopores in a graphene sheets, the authors said that they apply different energy (ev/atom) to the clusters, normally the range of the applied energies are 5 to 350 ev/atoms. These energies should be more than a special value to leads to the rupture of graphene sheet, otherwise the cluster spread in the lateral direction along the surface. I just do not know that how they apply the different energies? They change something in the potential files or there is a command in lammps to do this.
I know my question may be very basic, but it has been few days that i am struggling with that. Your help will be appreciated.

Thank you very much

Hello dear lammps users,

in some papers about fabrication of nanopores in a graphene sheets, the
authors said that they apply different energy (ev/atom) to the clusters,
normally the range of the applied energies are 5 to 350 ev/atoms. These
energies should be more than a special value to leads to the rupture of
graphene sheet, otherwise the cluster spread in the lateral direction along
the surface. I just do not know that how they apply the different energies?
They change something in the potential files or there is a command in lammps
to do this.

looking for this http://lammps.sandia.gov/doc/velocity.html ?

Hello dear Axel,
thank you for your help.
i dont think that velocity command is what i am looking for. please see the attachments.

Best regards

Screen Shot 2017-02-05 at 11.51.56 PM.jpg

Screen Shot 2017-02-05 at 11.50.05 PM.png

Hello dear Axel,
thank you for your help.
i dont think that velocity command is what i am looking for. please see the
attachments.

on the contrary, this is *exactly* the command you are looking for.
your initial post wasn't quite clear in how "clusters" figure into
this, but now it is clear.

axel.

Thank you dear Axel,
sorry for asking, but how i can apply different energy (ev/atom) in the velocity command?

Thank you dear Axel,
sorry for asking, but how i can apply different energy (ev/atom) in the
velocity command?

by setting different velocities, of course.