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

Nano Lett. 2008 Feb;8(2):637-41. doi: 10.1021/nl0730514. Epub 2008 Jan 16.

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.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Cadmium Compounds / chemistry*
  • Cadmium Compounds / radiation effects
  • Catalysis
  • Gold / chemistry*
  • Gold / radiation effects
  • Light
  • Materials Testing
  • Nanostructures / chemistry*
  • Nanostructures / radiation effects*
  • Nanotechnology / methods*
  • Particle Size
  • Photochemistry / methods*
  • Selenium Compounds / chemistry*
  • Selenium Compounds / radiation effects
  • Static Electricity

Substances

  • Cadmium Compounds
  • Selenium Compounds
  • Gold
  • cadmium selenide