Gold nanoparticles quench fluorescence by phase induced radiative rate suppression

被引：713

作者：

Dulkeith, E

Ringler, M

Klar, TA ^{[1
]}

Feldmann, J

Javier, AM

Parak, WJ

机构：

[1] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80539 Munich, Germany

[2] Univ Munich, CENS, D-80539 Munich, Germany

来源：

NANO LETTERS | 2005年 / 5卷 / 04期

关键词：

D O I：

10.1021/nl0480969

中图分类号：

O6 [化学];

学科分类号：

0703 [化学];

摘要：

The fluorescence quantum yield of Cy5 molecules attached to gold nanoparticles via ssDNA spacers is measured for Cy5-nanoparticle distances between 2 and 16 nm. Different numbers of ssDNA per nanoparticle allow to fine-tune the distance. The change of the radiative and nonradiative molecular decay rates with distance is determined using time-resolved photoluminescence spectroscopy. Remarkably, the distance dependent quantum efficiency is almost exclusively governed by the radiative rate.

引用

收藏

页码：585 / 589

页数：5

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