| 초록 |
Recently, opal photonic crystal films are fabricated for various applications. There are various methods for opal films including spraying, dipping, and spin coating. We fabricate thin films of several micrometer thickness by bar coating inorganic colloids dispersed in DI water. In this study, we used anionically charged ZnS/SiO2 microspheres to fabricate opal films. For demonstration, we fabricated the opal film of the ZnS/SiO2 microspheres on the glass tiles. The films showed specific reflective colors by constructive interference of light. In addition, we coated an inorganic binder upon the opal film to improve mechanical strength. High refractive index of ZnS/SiO2 microspheres enabled strong diffraction of light from opal structure even with inorganic binder at the interstitial spaces. |
