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Self-Assembly of Block Copolymers for Photonic-Bandgap Materials

机译：用于光子禁带材料的嵌段共聚物的自组装

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摘要

Self-assembled block copolymer systems with an appropriate molecular weight to produce a length scale that will interact with visible light are an alternative platform material for the fabrication of large-area, well-ordered photonic-bandgap structures at visible and near-IR frequencies. Over the past years, one-, two-, and three-dimensional photonic crystals have been demonstrated with various microdomain structures created through microphase separation of block copolymers. The size and shape of periodic microstructures of block copolymers can be readily tuned by molecular weight, relative composition of the copolymer, and blending with homopolymers or plasticizers. The versatility of photonic crystals based on block copolymers is further increased by incorporating inorganic nanoparticles or liquid-crystalline guest molecules (or using a liquid-crystalline block), or by selective etching of one of the microdomains and backfilling with high-refractive-index materials. This article presents an overview of photonic-bandgap materials enabled by self-assembled block copolymers and discusses the morphology and photonic properties of block-copolymer-based photonic crystals containing nanocomposite additives. We also provide a view of the direction of future research, especially toward novel photonic devices.
机译：具有合适分子量以产生将与可见光相互作用的长度尺度的自组装嵌段共聚物体系是用于在可见光和近红外频率下制造大面积，井井有条的光子带隙结构的替代平台材料。在过去的几年中，已经证明了一维，二维和三维光子晶体具有通过嵌段共聚物的微相分离产生的各种微畴结构。嵌段共聚物的周期性微结构的尺寸和形状可以容易地通过分子量，共聚物的相对组成以及与均聚物或增塑剂的共混来调节。通过掺入无机纳米粒子或液晶客体分子（或使用液晶嵌段），或通过选择性刻蚀微区之一并用高折射率材料回填，进一步提高了基于嵌段共聚物的光子晶体的多功能性。本文概述了通过自组装嵌段共聚物实现的光子带隙材料，并讨论了包含纳米复合添加剂的基于嵌段共聚物的光子晶体的形貌和光子特性。我们还提供了未来研究方向的观点，尤其是对新型光子器件的研究方向。

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