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Polymerization-Induced Colloidal Assembly and Photonic Crystal Multilayer for Coding and Decoding

机译：聚合诱导的胶体组装和用于编码和解码的光子晶体多层

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摘要

Photonic crystal (PC) films are prepared by precipitation of colloidal crystal seeds in supersaturated solution of particles, followed by crystal growth and structure fixing with photo-polymerization. As the liquid monomer becomes a solid matrix, the highly concentrated particles are forced to precipitate into colloidal microcrystals in short time, and 'polymerization-induced colloidal assembly' (PICA) is shown to be the major driving force to form colloidal crystals. PICA is intrinsically different from evaporation-induced colloidal assembly, because the seed formation and crystal growth are separated into two independent steps, which makes the synthesis more flexible, controllable, and efficient. The PICA process is capable of quickly producing PC films with an ultra-narrow bandgap, tunable thickness, and large size. Based on these characteristics and the blocking effect of the outer PC layer to the reflection signal of inner layer, a coding-decoding system is developed in which the film's composition and stacking sequence can be identified by its distinctive reflection spectrum.
机译：光子晶体（PC）膜的制备方法是，将胶态晶种沉淀在颗粒的过饱和溶液中，然后通过光聚合作用进行晶体生长和结构固定。随着液态单体变成固体基质，高浓度颗粒被迫在短时间内沉淀成胶体微晶，而“聚合诱导胶体组装”（PICA）被证明是形成胶体晶体的主要驱动力。 PICA与蒸发诱导的胶体组装本质上不同，因为种子形成和晶体生长被分为两个独立的步骤，这使合成更加灵活，可控制和高效。 PICA工艺能够快速生产具有超窄带隙，可调厚度和大尺寸的PC膜。基于这些特性和外层PC层对内层反射信号的阻挡作用，开发了一种编解码系统，可以通过其独特的反射光谱来识别薄膜的成分和堆叠顺序。

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  • 来源
    《Advanced Functional Materials》 |2014年第6期|817-825|共9页
  • 作者

    Dongpeng Yang; Yuhang Qin; Siyun Ye; Jianping Ge;

  • 作者单位

    Department of Chemistry Tongji University 1239 Siping Road, Shanghai, 200092, China;

    Department of Chemistry Tongji University 1239 Siping Road, Shanghai, 200092, China;

    Department of Chemistry Shanghai Key Laboratory of Green Chemistry and Chemical Process East China Normal University 3663 North Zhongshan Road, Shanghai, 200062, China;

    Department of Chemistry Shanghai Key Laboratory of Green Chemistry and Chemical Process East China Normal University 3663 North Zhongshan Road, Shanghai, 200062, China;

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