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\bibitem{Nourbakhsh_etal2011} {\textquotedblleft}\textit{Single layer vs bilayer graphene : a comparative study of the effects of oxygen plasma treatment on their electronic and optical properties}{\textquotedblright}. Nourbakhsh A, Cantoro M, Klekachev AV, Pourtois G, Vosch T, Hofkens J, van der Veen MH, Heyns MM, de Gendt S, Sels BF, The journal of physical chemistry: C : nanomaterials and interfaces \textbf{115}, 16619 (2011).   http://doi.org/10.1021/jp203010z

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