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

在这个项目中，我们的目标是产生由微米级二氧化硅核和软质聚合物壳(刷子)组成的核壳颗粒，作为光敏表面活性剂的储存库或存储设施。我们最近引入了光驱动扩散流(LDDO)的概念，它对多孔二氧化硅颗粒表现出最显著的影响，在含有光敏表面活性剂的水溶液中，由于颗粒中心扩散流在固-液界面附近导致相互排斥。通过这个系统，我们追求两个主要目标：(I)我们希望以类似的方式为球形刷子系统提供LDDO流程。(2)除了传递长程光可调相互作用势外，聚合物系统还提供微调粒子短程相互作用的可能性。应利用这一独特的组合来促进稳定的胶体聚集体的产生，并创造具有可变活性、流体动力相互作用和短程吸引力的多种自推剂组合。

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.