Ultrafast charge transfer at TiO2/SCN- (aq) interfaces investigated by femtosecond transient reflecting grating method

被引：29

作者：

Morishita, T

Hibara, A

Sawada, T

Tsuyumoto, I

机构：

[1] Univ Tokyo, Sch Engn, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

[2] Kanazawa Inst Technol, Dept Environm Syst Engn, Nonoichi, Ishikawa 9218501, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 29期

关键词：

D O I：

10.1021/jp984729u

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 applied a femtosecond transient reflecting grating (TRG) method to solid/liquid interfaces to successfully observe the photoinduced ultrafast relaxation dynamics at TiO2(001)/KSCN (aq) interfaces, We found, for the first. time, an ultrafast relaxation component (110-690 fs). The component intensity clearly increases with increasing concentration of KSCN, and it is strongly dependent on the number of photoexcited carriers, We concluded that this component is due to the interaction between photoinduced nonequilibrium holes and adsorbed SCN- ions and that ultrafast charge transfer occurs by way of this interaction. These results suggest a new ultrafast charge transfer process involving nonequilibrium carriers.

引用

页码：5984 / 5987

页数：4

共 18 条

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