title: Selective growth of PbSe on one or both tips of colloidal semiconductor nanorods.
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.
authors.affiliation: Center for Nanoscience, Ludwig Maximilians Universität München, Munich, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Kudera
authors.forename: Luigi
authors.initials: L
authors.lastname: Carbone
authors.forename: Maria Francesca
authors.initials: MF
authors.lastname: Casula
authors.forename: Roberto
authors.initials: R
authors.lastname: Cingolani
authors.forename: Andrea
authors.initials: A
authors.lastname: Falqui
authors.forename: Etienne
authors.initials: E
authors.lastname: Snoeck
authors.forename: Wolfgang J
authors.initials: WJ
authors.lastname: Parak
authors.forename: Liberato
authors.initials: L
authors.lastname: Manna
mesh_terms: D000327:Adsorption; D019187:Cadmium Compounds / Q000032:analysis / Q000737:chemistry*; D003102:Colloids / Q000032:analysis / Q000737:chemistry; D003460:Crystallization / Q000379:methods*; D007854:Lead / Q000032:analysis / Q000737:chemistry*; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D018036:Selenium Compounds / Q000032:analysis / Q000737:chemistry*; D012666:Semiconductors; D013440:Sulfides / Q000032:analysis / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D003102:Colloids; D018036:Selenium Compounds; D013440:Sulfides; C034939:cadmium sulfide; C088065:lead selenide; D007854:Lead; C058667:cadmium selenide