Journal of Chemical Sciences

, Volume 109, Issue 6, pp 497–507 | Cite as

Capped semiconductor colloids: Synthesis and photochemistry of CdS capped SnO2 nanocrystallites

  • Robert Kennedy
  • Ignacio Martini
  • Greg Hartland
  • Prashant V Kamat
Photochemical Conversion And Storage Of Solar Energy


Cds-capped SnO2 (CdS@SnO2) and SiO2 (CdS@SiO2) colloids of 50–80 Å in diameter have been prepared in aqueous medium. Significant quenching of CdS emission is observed in the CdS@SnO2 system as the electrons are injected from the excited CdS shell into the SnO2 core. Photoinduced charge separation in this system also results in transient bleaching in the 450 nm region. Picosecond laser flash photolysis studies of composite semiconductor nanoclusters that highlight the effect of the metal oxide core on the photophysical properties of the outer CdS shell are described.


CdS-capped SnO2 and SiO2 colloids composite semiconductor systems emission properties molecular devices 


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Copyright information

© the Indian Academy of Sciences 1997

Authors and Affiliations

  • Robert Kennedy
    • 1
  • Ignacio Martini
    • 1
  • Greg Hartland
    • 1
  • Prashant V Kamat
    • 2
  1. 1.Department of ChemistryUniversity of Notre DameNotre DameUSA
  2. 2.Radiation LaboratoryUniversity of Notre DameNotre DameUSA

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