CAPPED SEMICONDUCTOR COLLOIDS - SYNTHESIS AND PHOTOCHEMISTRY OF CDS CAPPED SNO2 NANOCRYSTALLITES

Authors
KENNEDY R MARTINI I HARTLAND G KAMAT PV
Citation
R. Kennedy et al., CAPPED SEMICONDUCTOR COLLOIDS - SYNTHESIS AND PHOTOCHEMISTRY OF CDS CAPPED SNO2 NANOCRYSTALLITES, Proceedings of the Indian Academy of Sciences. Chemical sciences, 109(6), 1997, pp. 497-507
Citations number
52
Journal title
Proceedings of the Indian Academy of Sciences. Chemical sciences → ACNP
ISSN journal
02534134
Volume
109
Issue
6
Year of publication
1997
Pages
497 - 507
Database
ISI
SICI code
0253-4134(1997)109:6<497:CSC-SA>2.0.ZU;2-L
Abstract
Cds-capped SnO2 (CdS@SnO2) and SiO2 (CdS@SiO2) colloids of 50-80 Angst rom in diameter have been prepared in aqueous medium. Significant quen ching of CdS emission is observed in the CdS@SnO2 system as the electr ons are injected from the excited CdS shell into the SnO2 core. Photoi nduced charge separation in this system also results in transient blea ching in the 450 nm region. Picosecond laser flash photolysis studies of composite semiconductor nanoclusters that highlight the effect of t he metal oxide core on the photophysical properties of the outer CdS s hell are described.