Patent application number | Description | Published |
20080296539 | METHOD OF MODIFYING CARBON NANOTUBE USING RADICAL INITIATOR, AND DISPERSION LIQUID AND ELECTRODE COMPRISING THE CARBON NANOTUBE MODIFIED BY USING THE METHOD - Provided is a method of modifying carbon nanotubes, the method including: preparing a mixed solution in which a radical initiator and a carbon nanotube are dispersed; applying energy to the mixed solution to decompose the radical initiator into a radical; and reacting the decomposed radical with a surface of the carbon nanotube, wherein the radical which has reacted with the carbon nanotube is detached from the carbon nanotube after the reaction with the carbon nanotube. In the method of modifying carbon nanotube, a radical is reacted with a carbon nanotube and then separated from the carbon nanotube to thus modify the surface of the carbon nanotube without chemical bonding. Accordingly, the conductivity of the carbon nanotube can be increased. | 12-04-2008 |
20080299374 | TRANSPARENT ELECTRODE COMPRISING CARBON NANOTUBE AND METHOD OF PREPARING THE SAME - Disclosed is a method of manufacturing a transparent electrode having a carbon nanotube. The carbon nanotube powder is dispersed in a solvent to form a carbon nanotube ink. The carbon nanotube ink is coated on a substrate to prepare a carbon nanotube film. The carbon nanotube has a defect formed on a surface thereof. The defect is formed through an acid treatment process of immersing the carbon nanotube powder or the carbon nanotube film in a nitric acid, a sulfuric acid, a hydrochloric acid, a phosphoric acid, or a mixture thereof. The defect can be formed through an ultrasonic treatment process of exposing the carbon nanotube powder or the carbon nanotube film to an ultrasonic wave having a predetermined frequency and intensity. | 12-04-2008 |
20090020732 | METHOD OF SELECTIVELY SEPARATING CARBON NANOTUBES, ELECTRODE COMPRISING METALLIC CARBON NANOTUBES SEPARATED BY THE METHOD AND OLIGOMER DISPERSANT FOR SELECTIVELY SEPARATING CARBON NANOTUBES - Provided is method of selectively separating carbon nanotubes into metallic carbon nanotubes and semiconducting carbon nanotubes, the method including: preparing a mixture including a dispersant, carbon nanotubes, and a solvent; dispersing the carbon nanotubes in the mixture; and separating the semiconducting carbon nanotubes from the mixture in which the carbon nanotubes are dispersed, wherein the dispersant is an oligomer including about 2 to about 24 repeat units, each including a head moiety and a tail moiety, wherein the head moiety comprises 1 to about 5 aromatic hetero rings, and the tail moiety comprises a hydrocarbon chain or chains connected to the head moiety. | 01-22-2009 |
20090071533 | TRANSPARENT ELECTRODE COMPRISING GRAPHENE SHEET, AND DISPLAY AND SOLAR CELL INCLUDING THE ELECTRODE - Provided is a transparent electrode including a graphene sheet. A transparent electrode having high conductivity, low sheet resistance, and low surface roughness can be prepared by employing the graphene sheet. | 03-19-2009 |
20090110627 | GRAPHENE SHEET AND METHOD OF PREPARING THE SAME - An economical method of preparing a large-sized graphene sheet having a desired thickness includes forming a film, the film comprising a graphitizing catalyst; heat-treating a gaseous carbon source in the presence of the graphitizing catalyst to form graphene; and cooling the graphene to form a graphene sheet. A graphene sheet prepared according to the disclosed method is also described. | 04-30-2009 |
20090155161 | METHOD OF PREPARING GRAPHENE SHELL AND GRAPHENE SHELL PREPARED USING THE METHOD - Provided are a method of preparing a graphene shell and a graphene shell prepared using the method. A first heat treatment is performed on a mixture of an organic solvent and a graphitization catalyst so as to carburize the graphitization catalyst with carbon decomposed from the organic solvent. The graphitization catalyst is in the form of particles. A second heat treatment process is performed on the carburized graphitization catalyst in an inert or reductive gas atmosphere to thereby form graphene shells on surfaces of the carburized graphitization catalyst | 06-18-2009 |
20090155561 | SINGLE CRYSTALLINE GRAPHENE SHEET AND PROCESS OF PREPARING THE SAME - A single-crystal graphene sheet includes a polycyclic aromatic molecule wherein a plurality of carbon atoms are covalently bound to each other, the single-crystal graphene sheet comprising between about 1 layer to about 300 layers; and wherein a peak ratio of a Raman D band intensity to a Raman G band intensity is equal to or less than 0.2. Also described is a method for preparing a single-crystal graphene sheet, the method includes forming a catalyst layer, which includes a single-crystal graphitizing metal catalyst sheet; disposing a carbonaceous material on the catalyst layer; and heat-treating the catalyst layer and the carbonaceous material in at least one of an inert atmosphere and a reducing atmosphere. Also described is a transparent electrode including a single-crystal graphene sheet. | 06-18-2009 |
20100140561 | CARBON NANOTUBE N-DOPING MATERIAL, CARBON NANOTUBE N-DOPING METHOD AND DEVICE USING THE SAME - Nicotinamide and/or a compound which is chemically combined with nicotinamide may be used as a carbon nanotube (“CNT”) n-doping material. CNTs n-doped with the CNT n-doping material may have long-lasting doping stability in the air without de-doping. Further, CNT n-doping state may be easily controlled when using the CNT n-doping material. The CNT n-doping material and/or CNTs n-doped with the CNT n-doping material may be used for various applications. | 06-10-2010 |
20110215416 | CARBON NANOTUBE N-DOPING MATERIAL, CARBON NANOTUBE N-DOPING METHOD AND DEVICE USING THE SAME - Nicotinamide and/or a compound which is chemically combined with nicotinamide may be used as a carbon nanotube (“CNT”) n-doping material. CNTs n-doped with the CNT n-doping material may have long-lasting doping stability in the air without de-doping. Further, CNT n-doping state may be easily controlled when using the CNT n-doping material. The CNT n-doping material and/or CNTs n-doped with the CNT n-doping material may be used for various applications. | 09-08-2011 |
20110244210 | GRAPHENE SHEET AND METHOD OF PREPARING THE SAME - An economical method of preparing a large-sized graphene sheet having a desired thickness includes forming a film, the film comprising a graphitizing catalyst; heat-treating a gaseous carbon source in the presence of the graphitizing catalyst to form graphene; and cooling the graphene to form a graphene sheet. A graphene sheet prepared according to the disclosed method is also described. | 10-06-2011 |
20120132862 | CARBON NANOTUBE DISPERSION AND METHOD OF PREPARING TRANSPARENT ELECTRODE USING THE CARBON NANOTUBE DISPERSION - Provided is a carbon nanotube dispersion including: carbon nanotubes, a solvent, and a dispersant, in which a mutifunctional ethylene oxide-propylene oxide block copolymer acts as the dispersant. The carbon nanotube dispersion provides excellent dispersion stability in aqueous and organic systems. Therefore, the carbon nanotube dispersion is suitable for a transparent electrode. | 05-31-2012 |
20120141666 | TRANSPARENT CARBON NANOTUBE ELECTRODE USING CONDUCTIVE DISPERSANT AND PRODUCTION METHOD THEREOF - Disclosed is a transparent carbon nanotube (CNT) electrode using a conductive dispersant. The transparent CNT electrode comprises a transparent substrate and a CNT thin film formed on a surface the transparent substrate wherein the CNT thin film is formed of a CNT composition comprising CNTs and a doped dispersant. Further disclosed is a method for producing the transparent CNT electrode. | 06-07-2012 |