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The dynamics of colloidal intrusions in liquid crystals: a simulation perspective
Liquid Crystals Reviews ( IF 5.1 ) Pub Date : 2014-09-24 , DOI: 10.1080/21680396.2013.878672
G. Foffano , J.S. Lintuvuori , A. Tiribocchi , D. Marenduzzo

Dispersing colloidal particles into liquid crystals provides a promising avenue to build a novel class of materials, with potential applications, among others, as photonic crystals, biosensors, metamaterials and new generation liquid crystal devices. Understanding the physics and dynamical properties of such composite materials is then of high-technological relevance; it also provides a remarkable challenge from a fundamental science point of view due to the intricacies of the hydrodynamic equations governing their dynamical evolution. Here, we provide an overview of our current theoretical understanding of the dynamical and hydrodynamic properties of colloid–liquid crystal composites, focussing on the results obtained from computer simulations; no or very limited previous knowledge of the field of liquid crystals is assumed. While our main emphasis is on the dynamics, we also review a selection of equilibrium results and simulations to provide the necessary background. We start by describing what we know about the simplest possible problem: that of a single particle in a nematic, or cholesteric, liquid crystal. We then consider two particles, and review the conditions which lead to the formation of a dimer; we then again focus on dynamical problems. Finally, we turn to the more complicated case of a dispersion, reviewing here simulations motivated by optical tweezer and rheological experiments. We close by making a list of some of the many open problems in this rapidly developing research field.



中文翻译:

液晶中胶体侵入的动力学:仿真视角

将胶体颗粒分散到液晶中提供了一种有前途的途径来构建新型材料,具有潜在的应用,例如光子晶体,生物传感器,超材料和新一代液晶设备。因此,了解此类复合材料的物理和动力学特性具有很高的技术意义;从基本的科学角度来看,由于控制流体动力学方程的流体动力学方程的复杂性,它也提出了巨大的挑战。在这里,我们概述了我们目前对胶体-液晶复合材料的动力学和流体力学特性的理论理解,重点是从计算机模拟中获得的结果。假设没有或非常有限的液晶领域的先前知识。虽然我们的重点是动力学,但我们也回顾了平衡结果和模拟的选择,以提供必要的背景。我们首先描述我们对最简单的可能问题的了解:向列型或胆甾型液晶中的单个粒子。然后,我们考虑两个粒子,并审查导致二聚体形成的条件;然后,我们再次关注动态问题。最后,我们转向更复杂的色散情况,在此回顾由光镊和流变学实验激发的模拟。最后,我们列出了这个快速发展的研究领域中许多未解决的问题。我们首先描述我们对最简单的可能问题的了解:向列型或胆甾型液晶中的单个粒子。然后,我们考虑两个粒子,并审查导致二聚体形成的条件;然后,我们再次关注动态问题。最后,我们转向更复杂的色散情况,在此回顾由光镊和流变学实验激发的模拟。最后,我们列出了这个快速发展的研究领域中许多未解决的问题。我们首先描述我们对最简单的可能问题的了解:向列型或胆甾型液晶中的单个粒子。然后,我们考虑两个粒子,并审查导致二聚体形成的条件;然后,我们再次关注动态问题。最后,我们转向更复杂的色散情况,在此回顾由光镊和流变学实验激发的模拟。最后,我们列出了这个快速发展的研究领域中许多未解决的问题。这里回顾由光学镊子和流变学实验激发的模拟。最后,我们列出了这个快速发展的研究领域中许多未解决的问题。这里回顾由光学镊子和流变学实验激发的模拟。最后,我们列出了这个快速发展的研究领域中许多未解决的问题。

更新日期:2014-09-24
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