在胶体半导体纳米棒的一个或两个尖端上选择性生长硒化铅。

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

作者信息

Kudera Stefan, Carbone Luigi, Casula Maria Francesca, Cingolani Roberto, Falqui Andrea, Snoeck Etienne, Parak Wolfgang J, Manna Liberato

机构信息

Center for Nanoscience, Ludwig Maximilians Universität München, Munich, Germany.

出版信息

Nano Lett. 2005 Mar;5(3):445-9. doi: 10.1021/nl048060g.

DOI:10.1021/nl048060g

PMID:15755092

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.

摘要

具有岩盐结构的PbSe纳米晶体生长在胶体CdS和CdSe纳米棒的尖端。纤锌矿棒的晶面为PbSe的生长提供了具有不同反应程度的基底。悬空Cd键的存在可能解释了不等价晶面之间的细微差异，导致PbSe仅在每个CdS棒的两个尖端之一上选择性成核。这种方法有可能促进具有定制光学和电子特性的异质结构的制造。