Abstract:
PURPOSE: A method for fabricating a photonic crystal using self assembly of particles at a solvent surface is provided, which fabricates the photonic crystal uniformly on a large area within a short time. CONSTITUTION: According to the method for fabricating a photonic crystal using nano particles, a nano particle having an effective density lower than a density of a solvent is dispersed uniformly in a solvent. Then the particles are self-assembled on the solvent surface by evaporating the solvent. And the self-assembled particles are transferred onto a substrate.
Abstract:
PURPOSE: A method for manufacturing gold nanoparticles is provided to obtain the gold nanoparticles with various shapes by controlling the amount or the reaction time of a reaction regulator. CONSTITUTION: A method for manufacturing gold nanoparticles forms a reaction solution by dissolving gold salt, a dispersing stabilizer, and a reaction controller. The reaction solution is heated. The reaction controller controls the concentration of salt ions in a reaction process. The generation of multiply twinned particles based on the gold nano particles is suppressed. The gold salt is one or more selected from a group including HAuCl_4, AuCl, AuCl_3, Au_4Cl_8, KAuCl_4, NaAuCl_4, NaAuBr_4, AuBr_3, AuBr, AuF_3, AuF_5, AuI, AuI_3, KAu(CN)_2, Au_2O_3, Au_2S, Au_2S_3, AuSe, Au_2Se_3, and AuTe_2.
Abstract:
The present invention relates to a method for producing rhombic dodecahedral gold nanoparticles comprising the following steps of: forming a reaction solution by dissolving gold salt, trisodium citrate, and a dispersion stabilizer in a reactive dispersion solution; adding a gold nanoparticle seed in the reaction solution; and heating the reaction solution. The rhombic dodecahedral gold nanoparticles formed by the present invention have the size distribution of 5% or less and the shape yield rate of 90% or more and absorb light in the visible light range by the local surface Plasmon resonance in the range of 520 to 660 nm.
Abstract:
A method for forming two-dimensional or three-dimensional colloidal crystals on the substrates by injecting a colloidal suspension into a space between two substrates and self-assembling colloidal particles by capillary force is provided. A method for preparing colloidal crystals comprises the steps of: injecting a colloidal suspension into a confined space between two substrates(11,12); forming a meniscus(16) in the confined space between the two substrates by moving one of the substrates while removing a solvent of the colloidal suspension; and forming colloidal crystals on the substrates by self-assembling colloidal particles(15) using capillary force(17) generated while the colloidal suspension solvent of the meniscus is removed by removal of the solvent of the colloidal suspension. The substrates are selected from a glass substrate, a silicon substrate, an aluminum substrate, a silica substrate, a gold substrate, a polystyrene substrate, a polyester substrate, a polydimethylsiloxane substrate, and a colloidal crystal-containing substrate. The method further comprises the step of filling any one or more selected from a semiconductor, a metal, a metal oxide, an organic matter and derivatives of the organic matter into pores of the self-assembled colloidal particles.
Abstract:
본 발명은 중공실리카의 제조 및 응용에 관한 것으로, 폴리올 용매를 이용하여 은나노결정을 합성하는 단계와, 상기 은나노결정에 실리카를 코팅하여 은-실리카 코어-쉘 나노입자를 합성하는 단계 및 상기 은-실리카 코어-쉘 나노입자의 은코어를 에칭하는 단계로 구성되는 중공실리카의 제조방법과, 이에 따라 제조되는 중공실리카 및 상기 중공실리카를 PET 필름에 코팅하여 얻어지는 저반사 코팅재를 포함하여 반사층의 반사율을 감소시킬 수 있다.
Abstract:
광추출층 형성 방법에 있어서, 실리케이트 졸 용액 및 티타늄 산화물 졸 용액을 혼합하여 광추출 조성물을 제조한다. 광추출 조성물을 사용하여 스핀-코팅 공정을 통해 투명 기판 상에 주름 또는 요철 구조를 갖는 광추출층을 형성한다. 광추출을 투명 기판 배면에 형성하여 광의 외부 방출 혹은 추출 효율을 증가시킬 수 있다.
Abstract:
PURPOSE: Hollow silica, a manufacturing method of the same, and a low reflective coating material manufactured using the same are provided to control the size of particles by synthesizing nanosilver crystals using polyol solvents with different viscosities. CONSTITUTION: A manufacturing method of hollow silica includes the following steps: nanosilver crystals are synthesized by using polyol solvents with adjusted viscosities; silica is coated on nanosilver crystals to synthesize silver-silica core-shell nanoparticles; and the silver cores of the silver-silica core-shell nanoparticles are etched. The polyol solvents are one or more selected from a group including ethylene glycol, 1,2-propanediol, 1,4-butanediol, or 1,5-pentanediol. The sizes of the nanosilver crystals are in a range between 30 and 50nm.
Abstract:
PURPOSE: A method for fabricating a photonic crystal using self assembly of particles at a solvent surface is provided, which fabricates the photonic crystal uniformly on a large area within a short time. CONSTITUTION: According to the method for fabricating a photonic crystal using nano particles, a nano particle having an effective density lower than a density of a solvent is dispersed uniformly in a solvent. Then the particles are self-assembled on the solvent surface by evaporating the solvent. And the self-assembled particles are transferred onto a substrate.
Abstract:
PURPOSE: A method for forming a light extraction layer, an organic light emitting display device, and a manufacturing method thereof are provided to form the light extraction layer which improves luminous characteristics by only the deposition process without an etching process or an imprinting process. CONSTITUTION: A light extraction layer (120) with an uneven part or a corrugated part is formed on the rear side of a substrate (100). The light extraction layer is formed by using light extraction compositions mixed with silicate sol solutions and titanium oxide sol solutions. A first electrode (110) is formed on the front side of the substrate. An organic layer (130) includes a hole transport layer and a light emitting layer which are successively formed on the first electrode. A second electrode (140) is formed on the organic layer.