Colloidal photonic crystals using colloidal nanoparticles and method for preparation thereof
AssigneeLG Chem, Ltd.
InventorsYoung-jun Hong, Sang-hyuk Im
Life of this patent
Estimating the term…
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.
Claims9
Colloidal photonic crystals comprising self-assembled nanoparticles and a viscoelastic material settling the nanoparticles with a predetermined elasticity, 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, and the nanoparticle is one or more selected from the group consisting of titanium oxide, zinc oxide, cerium oxide, tin oxide, thallium oxide, barium titanite, aluminum oxide, yttrium oxide, zirconium oxide, and copper oxide.
A method of preparing a base for colloidal photonic crystals, comprising the steps of:
- preparing colloidal photonic crystals comprising self-assembled nanoparticles and a viscoelastic material settling the nanoparticles with a predetermined elasticity, 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, and the nanoparticle is one or more selected from the group consisting of titanium oxide, zinc oxide, cerium oxide, tin oxide, thallium oxide, barium titanite, aluminum oxide, yttrium oxide, zirconium oxide, and copper oxide;
- and
- self-assembling another layer of colloidal particles, semiconductor particles, metal particles, or metal oxide particles in the gaps of the colloidal photonic crystals.
A method of preparing a base for colloidal photonic crystals, comprising the steps of:
- preparing colloidal photonic crystals comprising self-assembled nanoparticles and a viscoelastic material settling the nanoparticles with a predetermined elasticity, 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, and the nanoparticle is one or more selected from the group consisting of titanium oxide, zinc oxide, cerium oxide, tin oxide, thallium oxide, barium titanite, aluminum oxide, yttrium oxide, zirconium oxide, and copper oxide;
- manufacturing a reverse cast by using the colloidal photonic crystals;
- and
- transcribing the structure and shape of the reverse cast into the base.
A base for colloidal photonic crystals wherein another layer of colloidal particles, semiconductor particles, metal particles, or metal oxide particles is filled in the gaps of the colloidal photonic crystals, wherein the colloidal photonic crystals comprises self-assembled nanoparticles and a viscoelastic material settling the nanoparticles with a predetermined elasticity, 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, and the nanoparticle is one or more selected from the group consisting of titanium oxide, zinc oxide, cerium oxide, tin oxide, thallium oxide, barium titanite, aluminum oxide, yttrium oxide, zirconium oxide, and copper oxide.
Dependencies are inferred from the claim text.