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\bibitem{Gao_etal2012} {\textquotedblleft}\textit{Phase selection enabled formation of abrupt axial heterojunctions in branched oxide nanowires}{\textquotedblright}. Gao J, Lebedev OI, Turner S, Li YF, Lu YH, Feng YP, Boullay P, Prellier W, Van Tendeloo G, Wu T, Nano letters \textbf{12}, 275 (2012).   http://doi.org/10.1021/nl2035089

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