Selective Growth of PbSe on One or Both Tips of Colloidal Semiconductor Nanorods
Nano Letters2005Vol. 5(3), pp. 445–449
Citations Over TimeTop 1% of 2005 papers
Stefan Kudera, Luigi Carbone, Maria Francesca Casula, R. Cingolani, Andrea Falqui, E. Snoeck, Wolfgang J. Parak, Liberato Manna
Abstract
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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