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

页码：4166 / 4174

页数：9

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