Research on Structural Color Contact Lenses Based on Magnetically Controlled Photonic Crystals
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In this paper, Fe3O4 nanoparticles were prepared by solvothermal method, and the morphology, magnetic properties and potential of the particles were characterized. By applying magnetic fields of different strengths, the Fe3O4 particles self-assemble into an ordered structure to construct a magneto-responsive photonic crystal, and obtain different structural colors. The HEMA copolymer hydrogel was prepared by the ultraviolet polymerization method, and the structured color contact lenses was prepared by locking the chain-like photonic crystal structure of Fe3O4 particles by the hydrogel under the combined action of a magnetic field and ultraviolet light.
Fe3o4 particles, Photonic crystals, Structure color, Contact lenses