Size-Dependent Energy Transfer between CdSe/ZnS Quantum Dots and Gold Nanoparticles

被引：197

作者：

Li, Ming ^{[1
]}

Cushing, Scott K. ^{[1
,2
]}

Wang, Qiaoyi ^{[3
]}

Shi, Xiaodong ^{[3
]}

Hornak, Lawrence A. ^{[4
]}

Hong, Zhanglian ^{[5
]}

Wu, Nianqiang ^{[1
]}

机构：

[1] W Virginia Univ, Dept Mech & Aerosp Engn, WVNano Initiat, Morgantown, WV 26506 USA

[2] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA

[3] W Virginia Univ, Eugene Bennett Dept Chem, Morgantown, WV 26506 USA

[4] W Virginia Univ, Lane Dept Comp Sci & Elect Engn, Morgantown, WV 26506 USA

[5] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 17期

基金：

美国国家科学基金会;

关键词：

CHARGE-TRANSFER; ONE-STEP; FRET; FLUORESCENCE; METAL; SURFACE; PARTICLES; DISTANCE; DONORS; HG2+;

D O I：

10.1021/jz201002g

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：

This Letter deals with the effect of the particle size on the energy transfer from CdSe/ZnS quantum dots to the proximal gold nanoparticles with different sizes. The 3 nm sized gold nanoparticles have negligible localized surface plasmon resonance (LSPR) absorption and quench the fluorescence emission of the quantum dots with a 1/d(4) distance-dependence, indicating the nanometal surface energy transfer (NSET) mechanism. The 15 and 80 nm sized gold nanoparticles have strong LSPR absorption bands that overlap with the emission band of the quantum dots. The energy transfer efficiency depends on the 1/d(6) separation distance, which is dominated by the dipole dipole interaction according to Forster resonance energy transfer (FRET). The 80 nm sized gold nanoparticle displays higher quenching efficiency due to the increased spectral overlap of the LSPR band with the emission band of quantum dots.

引用

页码：2125 / 2129

页数：5

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