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| 20110104588 | METHOD OF PREPARING NANO-SIZED CATALYST ON CARBON SUPPORT - The present invention provides a method of synthesizing a nano-sized transition metal catalyst on a carbon support, including dissolving a stabilizer in ethanol thus preparing a mixture solution, adding a support to the mixture solution thus preparing a dispersion solution, dissolving a transition metal precursor in ethanol thus preparing a precursor solution, mixing the precursor solution with the dispersion solution with stirring, and then performing reduction, thus preparing the nano-sized transition metal catalyst. This method enables the synthesis of transition metal nanoparticles supported on carbon powder having a narrow particle size distribution and a wide degree of dispersion through a simple process, and is thus usefully applied to the formation of an electrode material or the like of a fuel cell. | 05-05-2011 |
| 20110118111 | PREPARATION METHOD FOR PtCo NANOCUBE CATALYST - The present invention features a method for preparing a PtCo nanocube catalyst, the method comprising dissolving a platinum (Pt) precursor, a cobalt (Co) precursor, a surface stabilizer and a reducing agent in a solvent to prepare a solution; heating the solution under an inert gas atmosphere; maintaining the temperature of the solution to obtain PtCo alloy nanocubes; adsorbing the PtCo alloy nanocubes on a carbon support to obtain a catalyst; and removing the surface stabilizer from the catalyst. The disclosed method for preparing a PtCo nanocube catalyst enables preparation of nanocubes with uniform size and cubic shape through a simple process and application for development of high-efficiency fuel cells by preventing change in shape, surface area and composition caused by agglomeration of the nanocubes. | 05-19-2011 |
| 20110123908 | METHOD FOR PREPARING NANO-SIZED METAL PARTICLES ON A CARBON SUPPORT - Disclosed is a method for preparing nickel or palladium nanoparticles supported on a carbon support. To a mixture solution wherein a stabilizer is dissolved in 1,2-propanediol, a carbon support is added to prepare a dispersion. Then, a precursor solution wherein a nickel or palladium precursor dissolved in 1,2-propanediol is mixed therewith and stirred. Then, nickel or palladium nanoparticles supported on the carbon support are prepared by reduction. The disclosed method for preparing nickel or palladium nanoparticles supported on a carbon support allows preparation of nanoparticles with narrow particle size distribution and good dispersibility through a simple process and the resulting nickel or palladium nanoparticles may be usefully applied, for example, as electrode materials of fuel cells. | 05-26-2011 |
| 20110129763 | SYNTHESIS METHODS OF CORE-SHELL NANOPARTICLES ON A CARBON SUPPORT - The present invention features a method for preparing core-shell nanoparticles supported on carbon. In particular, the present invention features a method for preparing core-shell nanoparticles supported on carbon, including: dispersing core nanoparticle powder supported on carbon in ethanol; adding a metal precursor which forms a shell and hydroquinone thereto; and mixing and reducing the same. Preferably, the disclosed method for preparing core-shell nanoparticles supported on carbon enables coating of transition metal nanoparticles including platinum on the surface of core metal nanoparticles at a monolayer level. Prepared core-shell nanoparticles of the present invention may be useful as catalysts or electrode materials of fuel cells. | 06-02-2011 |
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| 20090009064 | Organic Light Emitting Device Having Surface-Treated Bottom Electrode - Disclosed is a method of manufacturing an organic light emitting device, which comprises the steps of successively stacking a bottom electrode, an organic layer including an emission layer, and a top electrode, the method further comprising the step of: surface-treating the bottom electrode with ion beam etching before stacking the organic layer. By effectively removing impurities such as polymer materials or oxidation films, which are formed on the bottom electrode of the organic light emitting device, not only electron injection and hole injection in the organic light emitting device progress smoothly, but also an operation voltage is lowered and performance reliability can ensured because the surface roughness of the bottom electrode is maintained at the same level before and after ion milling. | 01-08-2009 |
| 20090315069 | THIN GALLIUM NITRIDE LIGHT EMITTING DIODE DEVICE - Disclosed is a light emitting diode (LED) device that comprises a crystal structure of a sapphire substrate-free gallium nitride (GaN) LED, wherein the crystal structure is mounted on a first surface of a sub-mount substrate in the form of a unit chip, and the first surface of the sub-mount substrate has a surface area greater than the surface area of a region in which the unit chip is bonded. Preforms for manufacturing the LED device and a method for manufacturing the LED device are also disclosed. The sapphire substrate, on which the crystal structure of the light emitting diode has grown, is processed into a unit chip before being removed. Thus, any crack in the crystal structure of the light emitting diode that may occur during the removal of the sapphire substrate can be prevented. Therefore, a thin light emitting diode device can be manufactured in a mass production system. | 12-24-2009 |
| 20090321764 | Method of Manufacturing Organic Light Emitting Device and Organic Light Emitting Device Manufactured by Using The Method - Disclosed is a method of manufacturing an organic light emitting device, an organic light emitting device manufactured by using the method, and an electronic device including the organic light emitting device. The method includes (a) forming an insulating layer on a lower electrode, (b) etching the insulating layer to form an opening ranging from an upper surface of the insulating layer to the lower electrode so that an overhang structure having a lowermost circumference that is larger than an uppermost circumference is formed, (c) forming a conductive layer on an upper surface of the lower electrode in the opening and a surface of the insulating layer other than the overhang structure, (d) forming an organic material layer on the conductive layer formed on the upper surface of the lower electrode in the opening, and (e) forming an upper electrode on an upper surface of the conductive layer disposed on the upper surface of the insulating layer and an upper surface of the organic material layer. | 12-31-2009 |
| 20100269149 | METHOD OF WEB SERVICE AND ITS APPARATUS - The present invention relates to a web service method and an apparatus therefor. A service apparatus in accordance with the present invention includes a message security gateway for security, an authentication server, an authorization server, a security policy server, a harmful site database, and an application server. User authentication employs SAML assertion of an SAML authority server. A service method in accordance with the present invention analyzes a message format and can employ security technologies although they have different message formats. | 10-21-2010 |
| 20110129759 | ELECTRODE FOR POLYMER ELECTROLYTE MEMBRANE FUEL CELL AND METHOD FOR FORMING MEMBRANE-ELECTRODE ASSEMBLY USING THE SAME - The present invention provides an electrode for a polymer electrolyte membrane fuel cell (PEMFC) and a method for forming a membrane-electrode assembly (MEA) using the same, in which carbon nanofibers are added to a catalyst layer to increase the mechanical strength of the catalyst layer and to maintain the thickness of the catalyst layer after operation for a long time, thus preventing a reduction in physical durability of the fuel cell, and cerium-zirconium oxide (CeZrO | 06-02-2011 |
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| 20100085134 | MICROWAVE LENS - A microwave lens having an array of electronic inductive capacitive cells wherein each cell includes an electrically conductive pattern which responds to incident microwave electromagnetic energy as an LC resonator. At least one of the cells includes at least one MEMS device which is movable in response to an electrical bias to thereby vary the resonant frequency of that cell. In order to bias the MEMS device, an electrical insulating layer extends along a portion of the pattern of the cell and to both sides of the MEMS device. An electrically conductive strip then extends over the insulating layer so that the conductive strip is electrically insulated from the pattern while electrically connected to the MEMS device. | 04-08-2010 |
| 20100134215 | THIN FILM BASED SPLIT RESONATOR TUNABLE METAMATERIAL - A metamaterial comprises a substrate and a plurality of resonators supported by the substrate, each resonator including a first conducting segment and a second conducting segment, there being at least one adjustable capacitor and at least one bias capacitor located between the first and second conducting segments. In some examples, the first conducting segment, second conducting segment, bias capacitor, and adjustable capacitor are substantially coplanar and may be formed by patterning a metal film supported by the substrate. Bias lines may be configured so as to allow a bias potential to be applied between the first and second conducting segments so as to vary the capacitance of the adjustable capacitor. | 06-03-2010 |
| 20100220035 | METAMATERIAL MICROWAVE LENS - A metamaterial microwave lens having an array of electronic inductive capacitive cells in which each cell has an electrically conductive pattern which corresponds to incident electromagnetic radiation as a resonator. At least one cell has a first and second electrical sections insulated from each other and each which section has at least two legs. A static capacitor is electrically connected between one leg of the first section of the cell and one leg of the second section of the cell. A MEMS device is electrically disposed between the other legs of the first and second sections of the cell. The MEMS device is movable between at least two positions in response to an electrical bias between the first and second sections of the cell to vary the index of refraction and resonant frequency of The cell. | 09-02-2010 |
| 20100230270 | MICROWAVE-BASED CONVEYING DEVICES AND PROCESSING OF CARBONACEOUS MATERIALS - Disclosed are methods for microwave-based recovery of hydrocarbons and other carbonaceous materials from solid carbon-containing compositions such as tires. Also disclosed are associated apparatuses. | 09-16-2010 |
| 20110109262 | WIRELESS ENERGY TRANSFER ANTENNAS AND ENERGY CHARGING SYSTEMS - A resonant wireless energy transfer system comprises first and second antennas made up of dual parallel wire helixes wherein the wires are terminated by short wires. Voltage controlled variable capacitors are connected into the antennas to permit progressive variation between folded dipole and normal dipole operating modes such that optimum energy transfer can be achieved between the antennas over a wide range of antenna separation distances. A vehicle battery charging system using the above-described antennas is provided including an installation which allows purchase of battery charging power by members of the general public. In-vehicle energy transfer for sensors, computers, cell phones and the like is also described. | 05-12-2011 |
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| 20090178428 | Ice making unit and refrigerator having the same - An ice making unit taking the form of a kit separably installed in a freezing compartment of a refrigerator. The ice making unit includes a water supply tank to supply water, an ice making case defining an external appearance of the ice making unit, the ice making case being formed, at an upper portion of a front surface thereof, with a water supply tank installation hole to allow the water supply tank to be slidably installed therethrough, at least one ice making tray installed in the ice making case to receive the water supplied from the water supply tank, and an ice separating device to separate ice from the ice making tray, and the water supply tank is coupled to or separated from the ice making case via forward and rearward sliding movement thereof. Supply of water into the ice making unit can be accomplished via simple coupling or separation of the water supply tank, resulting in convenient use of the ice making unit. | 07-16-2009 |
| 20100037631 | ICE MAKER AND METHOD, AND REFRIGERATOR HAVING THE SAME - Disclosed herein are an ice maker and method including an ice container to store ice, and a refrigerator having the same. The ice maker includes an ice making unit that receives water and produces ice from the water, a first ice container that receives the ice separated from the ice making unit, and an ice forwarding unit disposed at one side of the first ice container to guide the ice to be discharged to the outside. | 02-18-2010 |
