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\bibitem{Ke_etal2013} {\textquotedblleft}\textit{Dynamic motion of Ru-polyoxometalate ions (POMs) on functionalized few-layer graphene}{\textquotedblright}.  Ke X, Turner S, Quintana M, Hadad C, Montellano-L{\'o}pez A, Carraro M, Sartorel A, Bonchio M, Prato M, Bittencourt C, Van Tendeloo G;, Small \textbf{9}, 3922 (2013).   http://doi.org/10.1002/smll.201300378

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