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最新ACS nano 关于Graphene器件应用的研究
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Only a small fraction of all available metals has been used as electrode materials for carbon based devices due to metal graphene interface debonding problems. We report an enhancement of the bonding energy of weakly interacting metals by using a metal graphene metal sandwich geometry, without sacrifi cing the intrinsic π-electron dispersions of graphene that is usually undermined by strong metal graphene interface hybridization.This sandwich structure further makes it possible to e ff ectively tune the doping of graphene with an appropriate selection of metals. Density functional theory calculations reveal that the strengthening of the interface interaction is ascribed to an enhancement of interface dipole dipole interactions. Raman scattering studies of metal graphene copper sandwiches are used to validate the theoretically predicted tuning of graphene doping through sandwich structures.    |
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2012-05-05 11:07:27, 2.59 M
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