FEMTOSECOND STUDIES OF INTERPARTICLE ELECTRON-TRANSFER IN A COUPLED CDS-TIO2 COLLOIDAL SYSTEM

被引：88

作者：

EVANS, JE ^{[1
]}

SPRINGER, KW ^{[1
]}

ZHANG, JZ ^{[1
]}

机构：

[1] UNIV CALIF SANTA CRUZ,DEPT CHEM & BIOCHEM,SANTA CRUZ,CA 95064

来源：

JOURNAL OF CHEMICAL PHYSICS | 1994年 / 101卷 / 07期

关键词：

D O I：

10.1063/1.468376

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the direct femtosecond measurements of the electron transfer process from CdS to TiO2 particles in a coupled colloidal system. The electrons initially created in the conduction band and quickly trapped at the liquid-solid interface in aqueous CdS colloids are found to be transferred to the colloidal TiO2 particles with a time constant of 2 ps, resulting in significantly slower electron-hole recombination. These coupled semiconductor colloids provide a potentially useful system for achieving efficient charge separation, which is important for many chemical reactions involving heterogeneous electron transfer.

引用

页码：6222 / 6225

页数：4

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