| 초록 |
Responsive photonic crystals are periodic nanostructures with photonic bandgap that modulated by external stimuli. Compared with lots of stimuli, mechanical pressing or stretching represents a straightforward and effective strategy for manipulating the properties of photonic structures. Therefore, mechanochromic photonic crystals can be used for color display, sensor, ink, and optical devices. We introduce nonclose-packed face-centered cubic arrays of silica particles in an elastomer. The arrays are formed by interparticle repulsion exerted by dense solvation layers on the particle surface. In addition, synthetic melanin nanoparticles are inserted into the arrays to suppress the white scattering of light, so pronounce structural colors with high visibility in a white background. Moreover, the photonic films exhibit a large reversible shift of structural color under stretching. Finally, elastic photonic films with high visibility have an enormous potential for various areas. |
