Visible light-induced charge retention and photocatalysis with hybrid CdSe-Au nanodumbbells

Ronny Costi, Aaron E. Saunders, Einat Elmalem, Asaf Salant, Uri Banin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

437 Scopus citations

Abstract

Visible light photocatalysis is a promising route for harnessing of solar energy to perform useful chemical reactions and to convert light to chemical energy. Nanoscale photocatalytic systems used to date were based mostly on oxide semiconductors aided by metal deposition and were operational only under UV illumination. Additionally, the degree of control over particle size and shape was limited. We report visible light photocatalysis using highly controlled hybrid gold-tipped CdSe nanorods (nanodumbbells). Under visible light irradiation, charge separation takes place between the semiconductor and metal parts of the hybrid particles. The charge-separated state was then utilized for direct photoreduction of a model acceptor molecule, methylene blue, or alternatively, retained for later use to perform the reduction reaction in the dark.

Original languageAmerican English
Pages (from-to)637-641
Number of pages5
JournalNano Letters
Volume8
Issue number2
DOIs
StatePublished - Feb 2008

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