Low-temperature nanocrystal unification through rotations and relaxations probed by in situ transmission electron microscopy

M. van Huis, L.T. Kunneman, K. Overgaag, Q. Xu, G. Pandraud, H.W. Zandbergen, D.A.M. Vanmaekelbergh

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Through the mechanism of “oriented attachment”, small nanocrystals can fuse into a wide variety of one- and two-dimensional nanostructures. This fusion phenomenon is investigated in detail by low-temperature annealing of a two-dimensional array of 10 nm-sized PbSe nanocrystals, in situ in the transmission electron microscope. We have revealed a complex chain of processes; after coalescence, the connected nanocrystals undergo consecutive rotations in three-dimensional space, followed by drastic interfacial relaxations whereby full fusion is obtained.
Original languageUndefined/Unknown
Pages (from-to)3959-3963
Number of pages6
JournalNano Letters
Issue number11
Publication statusPublished - 2008

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