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The effect of layer number and substrate on the stability of graphene under MeV proton beam irradiation
S. Mathew, T.K. Chan, D. Zhan, K. Gopinadhan, A.-R. Barman, M.B.H. Breese, , Z.X. Shen, T. Venkatesan, J.T.L. Thong
Published in
Volume: 49
Issue: 5
Pages: 1720 - 1726
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 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. © 2010 Elsevier Ltd. All rights reserved.
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