4 research outputs found
The effect of layer number and substrate on the stability of graphene under MeV proton beam irradiation
The use of graphene electronics in space will depend on the radiation
hardness of graphene. The damage threshold of graphene samples, subjected to 2
MeV proton irradiation, was found to increase with layer number and also when
the graphene layer was supported by a substrate. The thermal properties of
graphene as a function of the number of layers or as influenced by the
substrate argue against a thermal model for the production of damage by the ion
beam. We propose a model of intense electronically-stimulated surface
desorption of the atoms as the most likely process for this damage mechanism.Comment: 20 pages, 5 figure