engleski

Exploring effects of the swift heavy ion beam charge state on the ion track production in graphene

Swift heavy ion impact induced intense electronic excitations can trigger dramatic changes like phase transitions or large scale defects formation along ion trajectory when passing through the material. Dimensions of thus produced ion tracks depend on the deposited energy density that is usually expressed in terms of energy loss (electronic stopping) of the swift heavy ion.In case of graphene and related 2D materials, that have attracted considerable attention over the last years, other factors can contribute to ion track production after swift heavy ion impact.In the present contribution, we present experimental results obtained in a recent experiment at Zagreb accelerator facility, when Raman spectroscopy and atomic force microscopy have been used for the analysis, showing the damage in graphene can depend strongly on the charge state of the swift heavy ion. Observed additional damage can be attributedto the increasedenergy loss of the swift heavy ion due tothe charge state increase. Molecular dynamics simulations have complemented these experimental results in order to investigate role of the substrate on damage production in graphene.

graphene ; swift heavy ion ; ion charge state ; molecular dynamics ; LAMMPS

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