Fluorescence enhancement by metal-core/silica-shell nanoparticles

被引：293

作者：

Tovmachenko, OG ^{[1
]}

Graf, C ^{[1
]}

van den Heuvel, DJ ^{[1
]}

van Blaaderen, A ^{[1
]}

Gerritsen, HC ^{[1
]}

机构：

[1] Univ Utrecht, Debye Inst, Soft Condensed Matter & Mol Biophys Dept, NL-3584 CC Utrecht, Netherlands

来源：

ADVANCED MATERIALS | 2006年 / 18卷 / 01期

关键词：

D O I：

10.1002/adma.200500451

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The enhancement of fluorescence by nanoparticles consisting of a metal core, a silica-spacer shell, and a dye-labeled shell, are observed. Fluorescence enhancement is expressed in terms of apparent quantum yield, the ratio of number of emitted photons in the presence of enhancement, and the number of absorbed photons in the absence of enhancement. The important factors that affect fluorescence enhancement are size and shape of nanoparticles, the orientation of dye dipole moments, the overlap of the absorption and emission bands of the dye and, the radiative decay and quantum yield of fluorescent molecules. Fluorescence enhancement results in shortening of excited-state lifetime thus improving the photostability of the dye.

引用

页码：91 / 95

页数：5

共 27 条

[21] Radiative decay engineering: the role of photonic mode density in biotechnology [J].