Layer-by-layer poly(phenylene ethynylene) films on silica microspheres for enhanced sensory amplification

被引：43

作者：

Wosnick, JH

Liao, JH

Swager, TM ^{[1
]}

机构：

[1] MIT, Dept Chem, Cambridge, MA 02139 USA

[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

MACROMOLECULES | 2005年 / 38卷 / 22期

关键词：

D O I：

10.1021/ma051182q

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Alternating polyelectrolyte "layer-by-layer" deposition has been used to create emissive thin films of a weakly anionic, nonaggregating poly(phenylene ethynylene) on silica microspheres. The resulting particles are smooth and emit fluorescence solely from the outside polymer-coated surface. Suspensions of the coated microspheres show similar fluorescence properties to polymers in solution, but with enhanced sensitivity (up to 200-fold) to nitroaromatic quenchers. These enhancements are attributed to a combination of surface and electronic effects.

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收藏

页码：9287 / 9290

页数：4

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