Photonic Janus Balls with Optical, Magnetic, and Density Anisotropy for Dynamic Structural-Color Tuning
발표자
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초록
내용
When all spreading parameters are negative, Janus configuration that exposes two drop phases to the continuous phase at comparable level can be obtained. In this work, a microfluidic system was used to produce uniform Janus particles. By incorporating aligned magnetic particles in one compartment, the Janus microparticles respond to the external magnetic field. By creating regular array of silica particles in the other compartment, structural colors were developed. If the magnetic alignment is different before curing, the magnetic orientation of the produced particles will be different. Particles with different structural colors have different orientations and different colors depending on the direction of the external magnetic field. The Janus microparticles with optical and magnetic anisotropy were able to dynamically switch structural colors on and off by controlling the external magnetic field, serving as active color pixels for reflection-mode displays.