Electric Field-Driven Assembly of Sulfonated Polystyrene Microspheres
Electric Field-Driven Assembly of Sulfonated Polystyrene Microspheres
复制标题
电场驱动磺化聚苯乙烯微球的组装
作者：
A. Mikkelsen;J. Wojciechowski;M. Rajňák;J. Kurimský;K. Khobaib;Ahmet Kertmen;Z. Rozynek
在液体界面处设计的颗粒组装为材料的开发提供了许多优势，并且可以通过多种方式进行。电场提供了一种灵活的方法，利用电流体动力循环流以及介电泳和电泳相互作用来构造液滴上的颗粒。除了所施加电场的特性之外，粒子的操纵通常取决于要组装的粒子的固有特性。在这里，我们提出了一种生产具有不同电性能的聚苯乙烯微粒的简单方法。这些粒子用于研究油滴本体和表面上的电场引导粒子组装。通过磺化聚苯乙烯颗粒，我们生产出一组具有一定范围介电常数和电导率的颗粒，这些介电常数和电导率与磺化反应时间相关。该论文提出了由电场驱动的多种粒子行为，包括不同液滴位置的粒子组装、粒子链以及具有各向异性特性的带状结构的形成。
A designed assembly of particles at liquid interfaces offers many advantages for development of materials, and can be performed by various means. Electric fields provide a flexible method for structuring particles on drops, utilizing electrohydrodynamic circulation flows, and dielectrophoretic and electrophoretic interactions. In addition to the properties of the applied electric field, the manipulation of particles often depends on the intrinsic properties of the particles to be assembled. Here, we present an easy approach for producing polystyrene microparticles with different electrical properties. These particles are used for investigations into electric field-guided particle assembly in the bulk and on surfaces of oil droplets. By sulfonating polystyrene particles, we produce a set of particles with a range of dielectric constants and electrical conductivities, related to the sulfonation reaction time. The paper presents diverse particle behavior driven by electric fields, including particle assembly at different droplet locations, particle chaining, and the formation of ribbon-like structures with anisotropic properties.