Dumbbell-Shaped Polyelectrolyte Brushes Studied by Depolarized Dynamic Light Scattering

被引：49

作者：

Hoffmann, Martin ^{[1
]}

Lu, Yan ^{[1
]}

Schrinner, Marc ^{[1
]}

Ballauff, Matthias ^{[1
]}

Harnau, Ludger ^{[2
,3
]}

机构：

[1] Univ Bayreuth, D-95440 Bayreuth, Germany

[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

[3] Univ Stuttgart, Inst Theoret & Angew Phys, D-70569 Stuttgart, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2008年 / 112卷 / 47期

关键词：

D O I：

10.1021/jp806765y

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：

We present the synthesis and comprehensive characterization of dumbbell-shaped polyelectrolyte brushes (DPB). The core of these particles consists of poly(methyl methacrylate) (PMMA) and poly(styrene) onto which a dense brush shell of poly(styrene sulfonate) is grafted. The morphology of DPB particles is studied in solution by cryogenic-transrnission electron microscopy. We demonstrate that well-defined DPB are generated that react to external stimuli such as surfactant and salt concentration. The rotational diffusion and collective relaxations of the DPB particles were monitored by depolarized dynamic light scattering (DDLS). Here we found a new relaxation mode in the DDLS-signal that can be ascribed to collective fluctuations of the polyelectrolyte layer affixed to the surface of the dumbbells.

引用

页码：14843 / 14850

页数：8

共 74 条

[1] Spherical polyelectrolyte brushes [J].