Photoelectrochemical analysis of size-dependent electronic structures of gold clusters supported on TiO2

被引：67
作者：
Kogo, Atsushi [1 ]
Sakai, Nobuyuki [1 ]
Tatsuma, Tetsu [1 ]
机构：
[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan
来源：
NANOSCALE | 2012年 / 4卷 / 14期
关键词：
NANOPARTICLES; ELECTROCHEMISTRY; POTENTIALS; NANOELECTRODES; LUMINESCENCE; COMPLEXES; PRODUCTS; SOLVENTS; REGION; STATE;
D O I：
10.1039/c2nr30480e
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Size-dependent electronic structures around the Fermi level of glutathione-protected gold clusters (0.9-1.4 nm in core diameter) were analyzed on the basis of photoinduced charge separation at the interface between the gold cluster and TiO2. Electron levels such as HOMO and LUMO were estimated from the dependencies of the photocurrents on the irradiation wavelength and the standard electrode potentials of electron donors employed. The potential of the occupied levels involved in the charge separation under visible or near infrared light shifts negatively as the cluster size increases.
引用
收藏
页码：4217 / 4221
页数：5
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