Peak Wavelength Mapping of Triangular Reflection in Spherical Colloidal Cluster with Icosahedral Symmetry

Ryosuke Ohnuki, Y. Takeoka, S. Yoshioka
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引用次数: 1

Abstract

Spherical colloidal clusters have various types of particle arrangements. Interestingly, one type has an icosahedron symmetry, characterized by the existence of five-fold axes. When the colloidal particle size is comparable to the wavelength of light, icosahedral colloidal clusters exhibit a unique triangular reflection with a specific wavelength, owing to optical interference. In this paper, we report the results of a detailed optical study on the position-dependent peak wavelength within the triangular region. Based on the map of the peak wavelength and spectral shape, we propose a structural model of the icosahedral colloidal cluster and discuss its formation process.
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二十面体对称球形胶团三角形反射的峰值波长映射
球形胶体团簇具有各种类型的粒子排列。有趣的是,一种类型具有二十面体对称,其特征是存在五重轴。当胶体粒径与光的波长相当时,由于光干涉,二十面体胶体团簇呈现出具有特定波长的独特三角形反射。在本文中,我们报告了一个详细的光学研究的结果,在三角区域内的位置依赖的峰值波长。基于峰波长图和光谱形状,提出了二十面体胶体团簇的结构模型,并讨论了其形成过程。
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