Method of forming microsphere having structural color

摘要

Provided is a method of forming a microsphere having a structural color, which includes providing a composition for generating a structural color including a curable material and magnetic nanoparticles dispersed in the curable material, forming an emulsion by adding the composition for generating a structural color to an immiscible solvent, arranging the magnetic nanoparticles located in the emulsion droplet of the curable material in a one-dimensional chain structure by applying a magnetic field to the emulsion, and fixing the chain structure by curing the emulsion droplet.

主权项

1. A method of forming a microsphere having a structural color, the method comprising:
providing a composition for generating a structural color, the composition including a curable material and magnetic nanoparticles dispersed in the curable material; adding the composition for generating a structural color to an immiscible solvent to form an emulsion including spherical droplets of the curable material dispersed in the immiscible solvent, each spherical droplet including the magnetic nanoparticles dispersed therein; applying a magnetic field to the emulsion to align the magnetic nanoparticles located in each spherical droplet of the curable material in one-dimensional chain structures; and curing the spherical droplets dispersed in the immiscible solvent while applying the magnetic field to the emulsion to i) fix the chain structures formed by the aligned magnetic nanoparticles in each spherical droplet and ii) form the microsphere which is cured and dispersed in the immiscible solvent, the microsphere including the fixed chain structures which are formed by the magnetic nanoparticles aligned and fixed in the cured material and having the structural color generated by a diffraction of light passing through the microsphere, wherein the microsphere contains an ordered structure of a photonic crystal due to the alignment of the magnetic nanoparticles, and a diffraction angle of the light passing through the microsphere is changed with rotation of the microsphere.