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Effect of sintering on the optical properties of SiO_2 colloidal crystal multilayers

机译：烧结对SiO_2胶体晶体多层膜光学性能的影响

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摘要

High-quality SiO_2 colloidal crystal multilayers were fabricated from ethanol solutions by the vertical deposition method and the effect of sintering on the optical properties of the samples was investigated. Optical properties, which are determined by the photonic band structure, were studied by means of light transmission and reflection measurements. The morphology of the samples was characterized by scanning electron microscopy (SEM). SEM images illustrate the ordered close package of the spherical colloids in planes parallel to the substrate surface. In addition, the sample is crackless as a result of an appropriate drying rate. It is shown that with the increase of the sintering final temperature, though the depth and the width of the peak of Bragg diffraction of the sample vary vastly, the peak produces few blue shifts. Optical measurement results were compared favorably to the microstructural properties of the colloidal crystal multilayers.
机译：采用垂直沉积法从乙醇溶液中制备出高质量的SiO_2胶体晶体多层膜，并研究了烧结对样品光学性能的影响。通过光透射和反射测量研究了由光子能带结构决定的光学性质。样品的形态通过扫描电子显微镜（SEM）表征。 SEM图像示出了在平行于基底表面的平面中球形胶体的有序紧密包装。另外，由于适当的干燥速率，样品是无裂纹的。结果表明，随着烧结最终温度的升高，尽管样品的布拉格衍射峰的深度和宽度变化很大，但该峰几乎没有蓝移。将光学测量结果与胶体晶体多层的微结构性质进行了比较。

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