| 초록 |
Colloidal arrays with periodic arrangement exhibit structural colors through wavelength-selective diffraction. In particular, the colloidal array can be formed in microbeads format using emulsion templates, which renders the colloidal crystals appealing for application of photonic inks. In this study, we suggest the production of elastic photonic microbeads with enhanced color saturation using O/O emulsion templates. With microfluidic device, the elastic microbeads are prepared by emulsifying dispersion of silica-in-PEGPEA in mineral oil and polymerization of PEGPEA. Silica particles form non-close packed array in the pPEGPEA due to the repulsive interaction, which renders the photonic microbeads showing structural colors. The microbeads are suspended in oil mixture for index-matching between the microbeads and medium, which enhance the color saturation by suppressing the incoherent scattering. Thus, the elastic microbeads with enhanced color saturation can be used as photonic inks. |
