Physics and Astronomy Faculty Publications

Document Type

Article

Abstract

We report on it colloidal synthesis of barbell-shaped nanocrystals comprising a type II hetero-junction of ZnSe and US domains and showing compelling evidence of photoinduced charge separation at the interface of ZnSe and US materials. The nanobarbells were fabricated in a two-step procedure by growing ZnSe caps onto polar facets of US nanorods. Under present synthetic conditions, minimal growth of ZnSe shell in the lateral direction and focusing of the barbell length distribution were observed. Formation of epitaxial interfaces between nearly lattice-matched ZnSe and US crystal phases was primarily evidenced by the observation of "spatially indirect" fluorescence and long radiative lifetimes corresponding to the decay of charge transfer states.

Publication Date

9-2009

Publication Title

Chemistry Of Materials

Volume

21

Issue

18

Start Page No.

4305

End Page No.

4309

DOI

10.1021/cm901615n

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