Cochleate‐Doped Liquid Crystal as Switchable Metamaterial Window Mediated by Molecular Orientation Modified Aggregation,Particle & Particle Systems Characterization

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Cochleate‐Doped Liquid Crystal as Switchable Metamaterial Window Mediated by Molecular Orientation Modified Aggregation
Particle & Particle Systems Characterization ( IF 2.7 ) Pub Date : 2020-03-20 , DOI: 10.1002/ppsc.202000067
Pappu Lakshmi Madhuri ₁ , Shuddhodana ₂ , Zaher M. A. Judeh ₂ , Ibrahim Abdulhalim ₁

Affiliation

A diversity of fascinating hollow and porous micro and nanoparticles are being developed for drug delivery purposes; however, their applications in other systems are barely touched. When filled by an active material, they form a tunable photonic metamaterial. Here, a small concentration of organic hollow cylinders called cochleates embedded into liquid crystals (LCs) is demonstrated to form a new switchable composite to control light scattering with voltage and temperature. The biocompatible cochleates, which are hollow, tube‐like, and hydrophilic in nature, can trap the liquid crystal molecules thus altering the system behavior. A switching device as thin as 6 µm with 12 wt% cochleates concentration is shown to be adequate to reveal a switchable privacy window. Possible molecular arrangement of the liquid crystal within the cochleate particles is suggested, and unexpected increase of the scattering with temperature depending on the applied voltage is observed as a result of change in the cochleate aggregation depending on the LC molecule orientation.

中文翻译：

耳蜗掺杂液晶作为分子取向修饰聚集介导的可切换超材料窗口

为了药物输送的目的，正在开发出各种引人入胜的中空和多孔微粒和纳米颗粒。但是，它们在其他系统中的应用几乎没有受到影响。当由活性材料填充时，它们形成可调谐的光子超材料。在这里，展示了嵌入液晶（LC）的小浓度有机空心圆柱体，称为耳蜗，可以形成一种新的可切换复合材料，以控制电压和温度下的光散射。具有生物相容性的耳蜗是空心的，管状且具有亲水性，可捕获液晶分子，从而改变系统行为。厚度仅为12 µ％的薄至6 µm的开关设备显示出足以显示可切换的隐私窗口。

更新日期：2020-03-20

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