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Nano Lett. 2005 Mar;5(3):445-9.

Selective growth of PbSe on one or both tips of colloidal semiconductor nanorods.

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  • 1Center for Nanoscience, Ludwig Maximilians Universit√§t M√ľnchen, Munich, Germany.


PbSe nanocrystals with rock-salt structure are grown on the tips of colloidal CdS and CdSe nanorods. The facets of wurtzite rods provide a substrate with various degrees of reactivity for the growth of PbSe. The presence of dangling Cd bonds may explain subtle differences between nonequivalent facets resulting in the selective nucleation of PbSe only on one of the two tips of each CdS rod. This approach has the potential to facilitate the fabrication of heterostructures with tailored optical and electronic properties.

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