Primary photochemical events in CdS semiconductor colloids as probed by picosecond laser flash photolysis

Autor:	Arthur J. Nozik, Prashant V. Kamat, Thomas W. Ebbesen, Nada M. Dimitrijevic
Rok vydání:	1989
Předmět:	Chemistry business.industry Analytical chemistry General Physics and Astronomy Viologen Laser Photochemistry Redox law.invention Colloid chemistry.chemical_compound Semiconductor law Triethanolamine medicine Flash photolysis Physical and Theoretical Chemistry Acetonitrile business medicine.drug
Zdroj:	Chemical Physics Letters. 157:384-389
ISSN:	0009-2614
Popis:	A picosecond laser flash photolysis study has been carried out to elucidate the primary photochemical events of CdS semiconductor colloids dispersed in acetonitrile. Excitation of CdS colloids with a 355 nm laser pulse (pulse width 18 ps) led to the formation of S −• ( k = 5 × 10 8 s −1 ) and this was suppressed when hole scavengers such as I − and triethanolamine were added to the colloidal suspension. The reduction of viologen compound and the oxidation of diethyldithiocarbamic acid were investigated to elucidate the interfacial charge transfer processes occurring in the subnanosecond time domain; the reduction and oxidation reactions occurred within 18 and 250 ps, respectively.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::629c9f76c64666dcb4cff8da05dc2e57 https://doi.org/10.1016/0009-2614(89)87267-7 Zobrazit plný text záznamu