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  • 09월 03일 23시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Controlled Assembly of Core-Shell Silica Microspheres for Photonic Crystals

등록일
2018년 8월 17일 15시 30분 00초
접수번호
0333
발표코드
MAT.P-339 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 18일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Material Chemistry
저자 및
공동저자
Seok Won Yoon, Kanghyun Song, Hee Jung Yang, Hee Sun Park, Kyu Hyung Lee, Nam hwi Hur *
Department of Chemistry, Sogang University, Korea
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.

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