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Morphological transformations and fusion of PbSe nanocrystals studied using atomistic simulations

By P.Z. Schapotschnikow, M.A. van Huis, H.W. Zandbergen, D.A.M. Vanmaekelbergh and T.J.H. Vlugt


Molecular dynamics simulations are performed on capped and uncapped PbSe nanocrystals, employing newly developed classical interaction potentials. Here, we show that two uncapped nanocrystals fuse efficiently via direct surface attachment, even if they are initially misaligned. In sharp contrast to the general belief, interparticle dipole interactions do not play a significant role in this “oriented attachment” process. Furthermore, it is shown that presumably polar, capped PbSe{111} facets are never fully Pb- or Se-terminated

Year: 2010
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