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Issue 29, 2016
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π-Bonding-dominated energy gaps in graphene oxide

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The chemical bonding in graphene oxide with oxygen concentrations from 50% to 1% is investigated using first-principle calculations. The energy gaps are mainly determined by the competition of the orbital hybridizations in the C–C, O–O, and C–O bonds. They are very sensitive to changes in the oxygen concentration and distribution. Five types of π-bonding exist on moving from full to vanishing adsorption, namely complete termination, partial suppression, 1D bonding, deformed planar bonding, and the well-behaved type. They can account for the finite and gapless characteristics, corresponding to O-concentrations of >25% and <3%, respectively. The feature-rich chemical bonding dominates the band structures and density of states, leading to diverse electronic properties.

Graphical abstract: π-Bonding-dominated energy gaps in graphene oxide

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Publication details

The article was received on 09 Jan 2016, accepted on 24 Feb 2016 and first published on 25 Feb 2016

Article type: Paper
DOI: 10.1039/C6RA00662K
RSC Adv., 2016,6, 24458-24463

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    π-Bonding-dominated energy gaps in graphene oxide

    N. T. Thuy Tran, S. Lin, O. E. Glukhova and M. Lin, RSC Adv., 2016, 6, 24458
    DOI: 10.1039/C6RA00662K

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