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|
| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 18일 (목요일) 11:00~12:30 |
| Code |
MAT.P-339 |
| Subject |
Controlled Assembly of Core-Shell Silica Microspheres for Photonic Crystals |
| Authors |
Seok Won Yoon, Kanghyun Song, Hee Jung Yang, Hee Sun Park, Kyu Hyung Lee, Nam hwi Hur *
Department of Chemistry, Sogang University, Korea
|
| Abstract |
We report on an efficient and reproducible approach to make photonic crystals on the basis of monodisperse core-shell silica (SiO2) microspheres. Diluted solution of silica seeds having an average diameter of about 40 nm was prepared by modified Stöber method, which was used as seeds for growing silica microspheres. Diameters of produced silica microspheres (core-SiO2) are ranged ranging from 75 to 340, which can be synthesized by adjusting the amount of silica precursors. Silica shells were coated on core-SiO2 microspheres by hydrolysis and condensation reactions of tetraethyl orthosilicate and octadecyl trimethoxysilane. Calcination of the coated SiO2 microspheres in air rendered the core-shell silica (CS-SiO2) microspheres. This size-controllable process allows large-scale synthesis of CS-SiO2. They are highly porous and monodisperse, and thus can be used as close-packed photonic crystal systems. We found that this colloidal assembly approach represents a simple and scalable method for generating high-quality photonic crystals. |
| E-mail |
llss410@naver.com |
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122nd General Meeting of the KCS