Fluorescence Enhancement, Blinking Suppression, and Gray States of Individual Semiconductor Nanocrystals Close to Gold Nanoparticles

被引：109
|
作者：
Ma, Xuedan [1 ]
Tan, Hua [1 ]
Kipp, Tobias [1 ]
Mews, Alf [1 ]
机构：
[1] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany
来源：
NANO LETTERS | 2010年 / 10卷 / 10期
关键词：
CdSe nanocrystals; gold nanoparticles; silica coating; photoluminescence; blinking suppression; CDSE QUANTUM DOTS; EMISSION; INTERMITTENCY; PHOTOLUMINESCENCE; FLUCTUATIONS; LUMINESCENCE; MONOLAYERS; BEHAVIOR; CELLS;
D O I：
10.1021/nl102451c
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The optical properties of nanocrystals arc drastically changed by the interaction with adjacent metal nanoparticules By time-resolved photoluminescence spectroscopy. we investigate CdSe multishell nanocrystals coupled to self-assembled films of Au nanoparticles The distance between emitter and metal is adjusted by coating the nanocrystals with silica shells These NCs showed increased fluorescence intensity, a decreased fluorescence lifetime, strong blinking suppression, and fluorescence from gray states These observations can be explained by the metal particle induced change of excitation and recombination rates
引用
收藏
页码：4166 / 4174
页数：9
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