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\bibitem{vanderStam_etal2015} {\textquotedblleft}\textit{Solution-processable ultrathin size- and shape-controlled colloidal Cu$_{2-x}$S nanosheets}{\textquotedblright}. van der Stam W, Akkerman QA, Ke X, van Huis MA, Bals S, de Donega CM, Chemistry of materials \textbf{27}, 283 (2015).   http://doi.org/10.1021/cm503929q

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