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• W3040473078 abstract "Molecular adsorption at the surface of a two-dimensional material poses numerous questions regarding the modification to the band structure and interfacial states, which of course deserve full attention. In line with this, first principles density functional theory is employed on a graphene/ammonia system. We identify the effects on the band structure due to strain, charge transfer and presence of molecular orbitals (MOs) of NH3 for six adsorption configurations. Induced-strain upon ammonia-adsorption opens the band gap (E g) of graphene due to the breaking of translational symmetry. The charge transfer/MOs of NH3 shifts the equilibrium Fermi energy (E F). The E g and E F values and charge density distribution are dependent on the adsorption configuration, where the MO structure of NH3 plays a crucial role. The presence of MOs of N or H-originated pushes the unoccupied states of graphene towards E F. NH3 forms an interfacial occupied state originating from N2p below the E F within ∼1.6 to 2.2 eV for all configurations. These findings enhance fundamental understanding of graphene/NH3 system." @default.
• W3040473078 created "2020-07-10" @default.
• W3040473078 creator A5035953325 @default.
• W3040473078 creator A5062972538 @default.
• W3040473078 date "2020-08-19" @default.
• W3040473078 modified "2023-09-26" @default.
• W3040473078 title "Distinguishing strain, charge and molecular orbital induced effects on the electronic structure: graphene/ammonia system" @default.
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• W3040473078 doi "https://doi.org/10.1088/1361-648x/aba155" @default.
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• W3040473078 hasPublicationYear "2020" @default.
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