论文标题
列晶晶体中的动态微粒电泳推进缺陷 - 多态性的电泳推进
Defect-polymorphism controlled electrophoretic propulsion of anisometric microparticles in a nematic liquid crystal
论文作者
论文摘要
胶体颗粒的非平凡形状会在液晶中产生复杂的弹性扭曲和拓扑缺陷，并在通过培养基管理电泳推进方面发挥关键作用。在这里，我们报告了有关静态液体晶体中垂直于导演的交替电场的磁化（雪人形）介电颗粒的缺陷和电泳转运的实验结果。我们证明，形状不对称会通过粒子上多个位置的成核点或环形缺损而产生缺陷 - 晶状体，并控制电泳推进的方向以及大小。我们的发现揭示了在液晶中易位的微粒，以用于微流体，受控运输和组装的新自由度。
Nontrivial shape of colloidal particles create complex elastic distortions and topological defects in liquid crystals and play a key role in governing their electrophoretic propulsion through the medium. Here, we report experimental results on defects and electrophoretic transport of anisometric (snowman-shaped) dielectric particles subjected to an alternating electric field perpendicular to the director in a nematic liquid crystal. We demonstrate that the shape asymmetry gives rise to defect-polymorphism by nucleating point or ring defects at multiple locations on the particle and controls the direction as well as the magnitude of the electrophoretic propulsion. Our findings unveil a novel degree of freedom in translocating microparticles in liquid crystals for applications in microfluidics, controlled transport and assembly.
