Dependence of fluorescence intensity on the spectral overlap between fluorophores and plasmon resonant single silver nanoparticles

被引：612

作者：

Chen, Yeechi ^{[1
]}

Munechika, Keiko ^{[1
]}

Ginger, David S. ^{[1
]}

机构：

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

NANO LETTERS | 2007年 / 7卷 / 03期

关键词：

D O I：

10.1021/nl062795z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We investigate the fluorescence from dyes coupled to individual DNA-functionalized metal nanoparticles. We use single-particle darkfield scattering and fluorescence microscopy to correlate the fluorescence intensity of the dyes with the localized surface plasmon resonance (LSPR) spectra of the individual metal nanoparticles to which they are attached. For each of three different dyes, we observe a strong correlation between the fluorescence intensity of the dye and the degree of spectral overlap with the plasmon resonance of the nanoparticle. On average, we observe the brightest fluorescence from dyes attached to metal nanoparticles that have a LSPR scattering peak similar to 40-120 meV higher in energy than the emission peak of the fluorophore. These results should prove useful for understanding and optimizing metal-enhanced fluorescence.

引用

页码：690 / 696

页数：7

共 52 条

[1] Radiative and nonradiative decay rates of a molecule close to a metal particle of complex shape [J].