Light-driven manipulation and ordering of spherical polymer brushes at solid liquid interfaces

在这个项目中，我们的目标是生成由微米级二氧化硅核和软聚合物壳（刷）作为光敏表面活性剂的水库或存储设施组成的核壳颗粒。我们最近介绍了光驱动的扩散渗流（LDDO）的概念，它表现出其最显着的效果与多孔二氧化硅颗粒，导致相互排斥，由于颗粒为中心的扩散渗流在附近的固-液界面在含有光敏表面活性剂的水溶液。对于该系统，我们追求两个主要目标：（i）我们希望以类似的方式使LDDO流可用于球形刷系统。(ii)除了传递长程光可调相互作用势之外，聚合物系统还提供了微调颗粒的短程相互作用的可能性。这种独特的组合将被利用，以促进稳定的胶体聚集体的创建和创建具有可变活性，流体动力学相互作用和短程吸引力的自推进剂的通用集合。

In this project we aim at generating core-shell particles consisting of micron-sized silica cores and a soft polymeric shell (brush) serving as a reservoir or storage facility for photosensitive surfactant. We have recently introduced the concept of light-driven diffusioosmotic flow (LDDO), which exhibits its most pronounced effects with porous silica particles, leading to mutual repulsion due to particle centred diffusioosmotic flow in the vicinity of solid-liquid interfaces in aqueous solution containing photosensitive surfactant. With this system we pursue two major goals: (i) the LDDO flow we want to make available for spherical brush systems in a similar manner. (ii) In addition to conveying long range light tunable interaction potential the polymer system offers the possibility of fine-tuning the short range interactions of the particles. This unique combination shall be exploited to facilitate the creation of stable colloidal aggregates and the creation of versatile ensembles of self-propelling agents with variable activity, hydrodynamic interactions and short range attraction.