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\bibitem{Ao_etal2010} {\textquotedblleft}\textit{Enhanced stability of hydrogen atoms at the graphene/graphane interface of nanoribbons}{\textquotedblright}. Ao ZM, Hern{\'a}ndez-Nieves AD, Peeters FM, Li S, Applied physics letters \textbf{97}, 233109 (2010).   http://doi.org/10.1063/1.3525377

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