The effect of layer number and substrate on the stability of graphene under MeV proton beam irradiation
2011
Mathew, S. | Chan, T.K. | Zhan, D. | Gopinadhan, K. | Barman, A.-R. | Breese, M.B.H. | Dhar, S. | Shen, Z.X. | Venkatesan, T. | Thong, John T.L.
The use of graphene electronics in space will depend on the radiation hardness of graphene. The damage threshold of graphene samples, subjected to 2MeV H⁺ 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.
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