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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/109/06/0497-0507

    • Keywords

       

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

    • Abstract

       

      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.

    • Author Affiliations

       

      Robert Kennedy1 Ignacio Martini1 Greg Hartland1 Prashant V Kamat2

      1. Department of Chemistry, University of Notre Dame, Notre Dame, IN - 46556, USA
      2. Radiation Laboratory, University of Notre Dame, Notre Dame, IN - 46556, USA

    • Dates

       
      Published
      December 1997

  • Journal of Chemical Sciences | News

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