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首页> 外文期刊>Physical review letters >Anomalous Diffusion of Motile Colloids Dispersed in Liquid Crystals
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Anomalous Diffusion of Motile Colloids Dispersed in Liquid Crystals

机译:分散在液晶中的运动胶体的异常扩散

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We study the superdiffusion of driven colloidal particles dispersed in a nematic liquid crystal. While motion is ballistic in the driving direction, our experiments show that transversal fluctuations become superdiffusive depending on the topological defect pattern around the inclusions. The phenomenon can be reproduced with different driving methods and propulsion speeds, while it is strongly dependent on particle size and temperature. We propose a mechanism based on the geometry of the liquid crystal backflow around the inclusions to justify the persistence of thermal fluctuations and to explain the observed temperature and particle size dependence of the superdiffusive behavior based on material and geometrical parameters.
机译:我们研究了分散在向列液晶中的驱动胶体粒子的超扩散。当运动沿行进方向弹道时,我们的实验表明,横向波动根据夹杂物周围的拓扑缺陷模式而变得超扩散。该现象可以通过不同的驱动方法和推进速度来重现,而它在很大程度上取决于粒径和温度。我们提出了一种基于包裹体周围液晶回流的几何形状的机制,以证明热波动的持续存在并根据材料和几何参数解释所观察到的温度和粒径对超扩散行为的依赖性。

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