The excited state dynamics of protein-encapsulated Au nanoclusters

被引：10

作者：

Shi, Jianying ^{[1
,2
]}

Cooper, Jason K. ^{[2
]}

Lindley, Sarah ^{[2
]}

Williams, Owen ^{[2
]}

Kliger, David S. ^{[2
]}

Xu, Yaolin ^{[3
]}

Bao, Yuping ^{[3
]}

Zhang, Jin Zhong ^{[2
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem & Chem Engn, Guangdong Higher Educ Inst, Key Lab Environm & Energy Chem, Guangzhou 510275, Guangdong, Peoples R China

[2] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA

[3] Univ Alabama, Dept Chem & Biol Engn, Tuscaloosa, AL 35487 USA

来源：

CHEMICAL PHYSICS LETTERS | 2014年 / 610卷

基金：

美国国家科学基金会;

关键词：

ULTRAFAST RELAXATION DYNAMICS; GOLD; FLUORESCENCE; CLUSTERS; LUMINESCENCE;

D O I：

10.1016/j.cplett.2014.07.009

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：

A combination of static and time-resolved spectroscopic techniques has been applied to study the low-lying excited electronic states of protein-encapsulated Au nanoclusters in terms of their energy levels and relaxation mechanisms. The energy levels were determined using photoluminescence (PL) spectroscopy. The excited state dynamics were probed using time-resolved PL techniques as well as femtosecond transient absorption (TA) spectroscopy. A simple model was proposed to account for the key spectral and dynamic features observed. This study has added new insight to the optical and dynamic properties of metal nanoclusters of interest in many applications including solar energy conversion and biomedical imaging. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：125 / 130

页数：6

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