Bandgap opening in Janus-type mosaic graphene

We demonstrate a novel Janus-type mosaic graphene (J-MOG) for achieving a ubiquitous bandgap opening by asymmetrical modification with covalently bonded H, F, Cl, and Br on opposing sides of graphene sheet. The theoretical capacity of J-MOG is shown to break the pattern restrictions, giving a robust non-zero gap. Our approach provides an effective pathway for the bandgap engineering of graphene for various electronic applications.

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