| 초록 |
Structural color by photonic crystals shows unique color properties. Reflective color can be controlled by size and distance of composed nano particles (NPs), and refractive index. Using this characteristic, photonic crystal can be applied in many fields. Especially, in many cosmetic fields tried applying particle shape structural color. However, photonic crystal in small particles shows low saturation by their white scattering. We used polystyrene (PS) NPs and eumelanin (EuM) NPs for improve color of fabricated photonic structural. Using micro fluidic device, we fabricated PS NPs with EuM NPs droplet and evaporate their water dispersion. PS NPs have high negative charge, they will form high order regular structure by repulsion force during evaporation. EuM NPs is very small and has black color, so they can act as white scattering absorption with nonintrusive structure formed by PS NPs. We show improved structural color supraballs using synthesized EuM NPs with microfluidic system. |
