Fabrication and optical properties of binary colloidal crystal monolayers consisting of micro- and nano-polystyrene spheres
Fabrication and optical properties of binary colloidal crystal monolayers consisting of micro- and nano-polystyrene spheres
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DOI：
10.1016/j.colsurfa.2011.12.070
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发表时间：
2012-02-20
影响因子：
5.2
通讯作者：
Fukuda, Takashi
中科院分区：
文献类型：
--
作者：
Emoto, Akira;Uchida, Emi;Fukuda, Takashi
由不同直径的球形颗粒组成的二元胶体晶体（bCCs）的自组装已被用于在玻璃细胞中的单层制造。该过程包括两个结晶步骤。当含有大球体的胶体悬浮液结晶时，在细胞的底部基底上形成单层。然后，将含有小球体的胶体悬浮液注射到细胞中，这些小球体聚集在大球体之间的间隙部分中。使用扫描电子显微镜（SEM）和反射光谱法表征所得的BCC单层。反射光谱反映了第二胶体晶体的bCC结构和对应于光栅常数的禁带。体心立方单层的结构和光学性质可以根据球的直径的比率来指定。提出的BCC单层制造工艺非常简单，因此非常适合实际应用。(C)2011 Elsevier B.V.保留所有权利。
Self-assembling of binary colloidal crystals (bCCs) consisting of spherical particles with different diameters has been used for monolayer fabrication in glass cells. The procedure involves two crystallization steps. Upon crystallization of a colloidal suspension containing large spheres, a monolayer is formed on the bottom substrate of the cell. Then, a colloidal suspension containing small spheres, which assemble in the interstitial parts between the large spheres, is injected into the cell. The resulting bCC monolayers are characterized using scanning electron microscopy (SEM) and reflection spectroscopy. Reflection spectra reflect the bCC structure and forbidden bands corresponding to the grating constant of the second colloidal crystal. The structure and optical properties of the bCC monolayer can be specified depending on the ratio of the diameters of the spheres. The proposed process for bCC monolayer fabrication is extremely simple, and therefore ideal for practical uses. (C) 2011 Elsevier B.V. All rights reserved.