| 초록 |
Photonic structure is three dimensional periodic structures in micron scale that influence on incident light lay and reflect certain rage of wavelength. In this study, we introduce a fabrication method of photonic films, which has different thicknesses, and it is conducted by only one-step of follow coating process. The coating conditions of blade controls the directional alignment of silica particles in the evaporative solvent. The coffee-ring effect, induced by the solvent evaporation near the meniscus lines, shows a deposition embracing self-assembly properties of particles. Because the balance of forces that act on the liquid’s surface moves the three-phase contact line and determines overall morphology of deposited films. Diversifying the coating speed, the photonic structure can give off different levels of hue gradationally and different colors are formed in a single film. The structures are observed by SEM and the optical characters are measured by UV-vis spectrometer. |
