期刊
ACS NANO
卷 6, 期 1, 页码 671-676出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn204148h
关键词
graphene; ribbon; edges; electron irradiation; stability
类别
资金
- Academy of Finland
Electron beam of a transmission electron microscope can be used to alter the morphology of graphene nanoribbons and create atomically sharp edges required for applications of graphene in nanoelectronics. Using density-functional-theory-based simulations, we study the radiation hardness of graphene edges and show that the response of the ribbons to irradiation Is not determined by the equilibrium energetics as assumed in previous experiments, but by kinetic effects associated with the dynamics of the edge atoms after impacts of energetic electrons. We report an unexpectedly high stability of armchair edges, comparable to that of pristine graphene, and demonstrate that the electron energy should be below similar to 50 keV to minimize the knock-on damage.
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