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Energy model and band-gap modulation of graphene band self-organized on the functional vicinal surfaces

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2 Author(s)
Wan, J.F. ; School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People''s Republic of China ; Kong, X.Y.

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An energy model of graphene band self-organized on the vicinal surfaces was proposed to study its stabilization mechanism. Based on the energy minimum principle, an equilibrium width equation of graphene band was built to explain the crossing-step growth mode. The narrowest graphene band (1–5 nm) with a zigzag edge compared with armchair and other edges was predicted to be more stable on the vicinal surface (<5 nm). The regularly stepped surface could provide a promising platform to realize the band-gap modulation engineering by means of the quantitative relation between the band-gap of graphene and the step width for future nanodevices.

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Applied Physics Letters  (Volume:98 ,  Issue: 1 )