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\bibitem{Grzelczak_etal2012} {\textquotedblleft}\textit{Steric hindrance induces crosslike self-assembly of gold nanodumbbells}{\textquotedblright}. Grzelczak M, S{\'a}nchez-Iglesias A, Heidari Mezerji H, Bals S, P{\'e}rez-Juste J, Liz-Marz{\'a}n LM, Nano letters \textbf{12}, 4380 (2012).   http://doi.org/10.1021/nl3021957

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