Electric field driven motion of single polyelectrolyte grafted colloids

单一聚电解质接枝胶体的电场驱动运动

• 批准号: 58098791
• 负责人: Professor Dr. Friedrich Kremer
• 金额: --
• 依托单位: Peter-Debye-Institut für Physik der weichen Materie
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/58098791?language=en
• 关键词: Electric; field; driven; motion; single

In the previous application period we have developed novel measurement systems which enable one – for the first time - to determine the electrophoretic mobility of single colloids in media of varying ionic strength and valency (Single-Colloid Electrophoresis (SCE)). It is the goal of the current proposal to extend this methodology to single polyelectrolyte–grafted colloids. This should allow us to unravel in detail the interaction between a grafted polymer with an external electric field under well controlled conditions (molecular weight of the polymers, grafting density, concentration and valency of the ions in the surrounding medium). As polymeric systems DNA, poly (acrylic acid) (PAA) and poly(2- vinylpyridine) (P2VP) are selected because with these systems our group has a refined expertise concerning the interacting between polymer-brushes. It is evident that this approach has the potential to lead to completely new measurement systems for the characterization of single, isolated (polymergrafted) colloids.

在上一个应用阶段，我们开发了新的测量系统，首次能够确定单一胶体在不同离子强度和化合价介质中的电泳迁移率（单胶体电泳（SCE））。当前提案的目标是将该方法扩展到单一聚电解质接枝的胶体。这将使我们能够详细地阐明接枝聚合物与外部电场在良好控制条件下（聚合物的分子量，接枝密度，周围介质中离子的浓度和价态）之间的相互作用。选择DNA、聚丙烯酸（PAA）和聚（2-乙烯基吡啶）（P2 VP）作为聚合物系统，因为我们的团队在这些系统中拥有有关聚合物刷之间相互作用的精湛专业知识。很明显，这种方法有可能导致全新的测量系统，用于表征单一的，孤立的（聚合物接枝）胶体。