Amplified fluorescence quenching of self-assembled polyelectrolyte-dye nanoparticles in aqueous solution

被引：20

作者：

Chen, Jiangshan ^{[1
]}

Dong, Wen-Fei ^{[2
,3
]}

Mohwald, Helmuth ^{[1
]}

Krastev, Rumen ^{[1
]}

机构：

[1] Max Planck Inst Colloids & Interfaces, Dept Interfaces, D-14424 Potsdam, Germany

[2] Univ Tokyo, Dept Mat Engn, Grad Sch Engn, Tokyo 1138656, Japan

[3] Univ Tokyo, Ctr NanoBio Integrat, Tokyo 1138656, Japan

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 05期

关键词：

D O I：

10.1021/cm071678h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Amplified fluorescence quenching of self-assembled polyelectrolyte-dye nanoparticles in aqueous solutions was demonstrated. Atomic force microscopy, transmission electron microscopy, and confocal laser scanning microscope (CLSM) were used to confirm the morphology of the polyelectrolyte-dye aggregates. The self aggregation of the PAH:PSA complex was then investigated by light scattering measurement and the complexes demonstrated increased scattering intensity. It was found that the ionic complexes of PAH:PSA can self-aggregate to nanoparticles in dilute aqueous solution, driven by the electrostatic interaction of ion pairs and during the spontaneous self-assembly, the confinement of pyrene molecules results in the fluorescence of excimer that can be efficiently and selectively quenched by anionic quencher AQS2-.

引用

页码：1664 / 1666

页数：3

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