| 자기조립을 통해 형성된 실리카 광자결정의 광특성에 미치는 열처리 효과 |
| 오용택, 김명순1, 신동찬 |
조선대학교 신소재공학과
1조선대학교 화학과 |
| Effect of Heat-Treatment on the Optical Properties of Self-Assembled SiO2 Photonic Crystals |
| Yong-Taeg O, Myung-Soon Kim1, Dong-Chan Shin |
Department of Advanced Materials Engineering, Chosun University
1Department of Chemistry, Chosun University |
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| ABSTRACT |
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We examined the effect of low temperature heat-treatment on the optical properties of the photonic crystals self-assembled using a monodispersed spherical $SiO_2$ nanoparticle. When the heat treatment temperature increased, the reflectance peak, which is induced by the photonic band gap, moved to a shorter wavelength direction, and the peak intensity of Fabry-Perot fringes also increased. The highest reflectance peak intensity was obtained in the sample heat-treated at $250~300^{circ}C$. The heat-treatment reduced the average particle size and the quantity of defects, and increased the packing density of the photonic crystal. |
| Key words:
Stober process, Photonic crystal, Heat treatment, Reflectance, Self-assembly, Nanoparticle |
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