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Photoluminescence And Band Gap Modulation In Graphene Oxide

Z. Luo, P. Vora, E. J. Mele, A. T. Johnson, J. M. Kikkawa
Published 2009 · Physics

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We report broadband visible photoluminescence from solid graphene oxide, and modifications of the emission spectrum by progressive chemical reduction. The data suggest a gapping of the two-dimensional electronic system by removal of π-electrons. We discuss possible gapping mechanisms, and propose that a Kekule pattern of bond distortions may account for the observed behavior.
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