Colloidal photonic crystals using colloidal nanoparticles and method for preparation thereof
AssigneeLG Chem, Ltd.
InventorsYoung-jun Hong, Sang-hyuk Im
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Abstract
The present invention relates to colloidal photonic crystals using colloidal nanoparticles and a method for the preparation thereof, wherein by adding a viscoelastic material into a solution containing the colloidal nanoparticles when preparing the colloidal photonic crystals, a uniform volume contraction occurs due to the elasticity of the viscoelastic material even when a nonuniform volume contraction occurs while drying a dispersion medium in the colloidal solution. Thus, it is possible to prepare 2 or 3 dimensional colloidal photonic crystals of large scale with no defects in less time.
Claims10
Method of preparing colloidal photonic crystals, comprising the following steps of:
- a) dispersing nanoparticles evenly in a dispersion medium to form a solution;
- b) dissolving a viscoelastic material into the solution;
- c) vaporizing the dispersion medium from the solution to self-assemble the nanoparticles on an interface of a dispersion medium-air-substrate;
- and
- d) transferring the self-assembled particles onto the substrate,
- wherein the viscoelastic material is one or more selected from the group consisting of polyvinyl pyrrolidone, polyvinyl alcohol, poly(p-phenylene vinylene), polyethylene glycol, polyethyleneamine, dextrine, polymethylmethacrylate, polyacrylate and polyvinyl chloride.
Dependencies are inferred from the claim text.