Reversible Electrochromic Pattern in 3D Photonic Crystals Film from Thiol-Acrylate-Based Polymer-Stabilized Blue Phase Liquid Crystals,Advanced Optical Materials

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Reversible Electrochromic Pattern in 3D Photonic Crystals Film from Thiol-Acrylate-Based Polymer-Stabilized Blue Phase Liquid Crystals
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-01-31 , DOI: 10.1002/adom.202202531
Meng Wang ₁ , He Song ₁ , Xiaosong Li ₁ , Zhaozhong Li ₂ , Hui Li ₃ , Jian Sun _{4,

5} , Wei Hu ₂ , Huai Yang _{2,

4,

5}

Affiliation

Endowing advanced 3D photonic nanoarchitectures with dynamic controllability is currently in the spotlight of soft-matter photonics research. Herein, a well-defined photopatterned polymer-stabilized blue phase (PSBP) film with 3D electrically tunable photonic bandgap is fabricated by a liquid crystalline thiol–acrylate monomers system. Remarkably, the addition of thiol monomers can effectively improve the electrical tuning performance of the PSBP film and maintain excellent thermal stability simultaneously. The proportions of acrylate and thiol monomers are proved to be a key factor on the morphology structure of the polymer network in the PSBP system. By masked UV photopolymerization, a patterned sample with a high-quality image and reversible nonsynergistic electrochromism is obtained. With increasing electric field, the patterned region changes from initial green reflection color to a red one, while no obvious visual color change occurs for the shading region with initial blue reflection color. The distinct electrically responsive behaviors are mainly caused by the microstructural difference of polymer networks, which is engendered by the migration of polymerizable monomers during polymerization. The research disclosed herein may provide new insights into the development of patterned 3D self-assembled liquid crystalline photonic crystal toward anticounterfeiting, displays, colorimetric sensors, labeling technology, and programming photonics.

中文翻译：

硫醇丙烯酸酯基聚合物稳定蓝相液晶 3D 光子晶体薄膜中的可逆电致变色图案

赋予先进的 3D 光子纳米结构动态可控性是目前软物质光子学研究的焦点。在此，具有 3D 电可调谐光子带隙的明确光图案化聚合物稳定蓝相 (PSBP) 薄膜由液晶硫醇-丙烯酸酯单体系统制造。值得注意的是，硫醇单体的加入可以有效提高PSBP薄膜的电调性能，同时保持优异的热稳定性。事实证明，丙烯酸酯和硫醇单体的比例是影响 PSBP 体系中聚合物网络形态结构的关键因素。通过掩蔽 UV 光聚合，获得了具有高质量图像和可逆非协同电致变色的图案化样品。随着电场的增加，图案区域由初始的绿色反射色变为红色，而初始蓝色反射色的遮光区域在视觉上没有明显的颜色变化。不同的电响应行为主要是由聚合物网络的微观结构差异引起的，这是由聚合过程中可聚合单体的迁移引起的。本文公开的研究可能为图案化 3D 自组装液晶光子晶体向防伪、显示、比色传感器、标记技术和编程光子学的发展提供新的见解。不同的电响应行为主要是由聚合物网络的微观结构差异引起的，这是由聚合过程中可聚合单体的迁移引起的。本文公开的研究可能为图案化 3D 自组装液晶光子晶体向防伪、显示、比色传感器、标记技术和编程光子学的发展提供新的见解。不同的电响应行为主要是由聚合物网络的微观结构差异引起的，这是由聚合过程中可聚合单体的迁移引起的。本文公开的研究可能为图案化 3D 自组装液晶光子晶体向防伪、显示、比色传感器、标记技术和编程光子学的发展提供新的见解。

更新日期：2023-01-31

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