Synthesis of Monodispersed Silica Microparticles in A Microreactor for Well-Organized Colloidal Photonic Crystals
Synthesis of Monodispersed Silica Microparticles in A Microreactor for Well-Organized Colloidal Photonic Crystals
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DOI：
10.2494/photopolymer.33.473
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发表时间：
2020-01-01
影响因子：
0.8
通讯作者：
Furumi, Seiichi
中科院分区：
文献类型：
--
作者：
Seki, Yutaro;Shibata, Yosuke;Furumi, Seiichi
在这份报告中，我们描述了单分散的二氧化硅微粒，即聚硅酸盐的合成，在微反应器的基础上Stober方法制造的组织良好的胶体光子晶体（CPC）薄膜的可见光反射性能。虽然浴合成的二氧化硅微粒给出了相对较高的变异系数（CV）值为14.1%的粒径，我们成功地提高了CV值从14.1%到5.5%的流动反应器中的二氧化硅微粒的微流体合成，所产生的分离的成核和生长过程。当我们通过垂直沉积技术制备二氧化硅微粒的各种CPC膜时，每个CPC膜在可见光波长范围内显示出具有超过60%的高反射率的布拉格反射的特征峰。此外，我们还发现CPC薄膜的反射光谱的实验结果与标量波近似（SWA）理论计算的结果一致。
In this report, we describe the syntheses of monodispersed microparticles of silica, that is, polysilicate, in a microreactor based on Stober method for fabrication of the well-organized colloidal photonic crystal (CPC) films with visible reflection properties. Although the bath synthesis of silica microparticles gave the relatively high coefficient of variation (CV) value of 14.1% in the particle diameter, we successfully improved the CV value from 14.1% to 5.5% by the microfluidic synthesis of silica microparticles in a flow reactor, arising from the separation of nucleation and growth processes. When we fabricated various CPC films of the silica microparticles by the vertical deposition technique, each CPC film showed a characteristic peak of Bragg reflection with a high reflectance over similar to 60% in the visible wavelength range. Moreover, we found that the experimental reflection spectra of CPC films have consistent with the theoretical spectra calculated by the scalar wave approximation (SWA) technique.