Selective growth of PbSe on one or both tips of colloidal semiconductor nanorods.
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.
Kudera
Stefan
S
Center for Nanoscience, Ludwig Maximilians Universität München, Munich, Germany.
Carbone
Luigi
L
Casula
Maria Francesca
MF
Cingolani
Roberto
R
Falqui
Andrea
A
Snoeck
Etienne
E
Parak
Wolfgang J
WJ
Manna
Liberato
L
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*
D019187:Cadmium Compounds; D003102:Colloids; D018036:Selenium Compounds; D013440:Sulfides; C034939:cadmium sulfide; C088065:lead selenide; D007854:Lead; C058667:cadmium selenide