Autor: |
Arthur J. Nozik, Prashant V. Kamat, Thomas W. Ebbesen, Nada M. Dimitrijevic |
Rok vydání: |
1989 |
Předmět: |
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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: |
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