Abstract: Carbon nanotubes and metal particle-containing carbon nanotubes are provided. The carbon nanotubes have increased surface area. A method of cutting carbon nanotubes is also provided. According to the method, the dispersion properties of the carbon nanotubes are improved by simplifying the structural changes and/or surface modifications of the carbon nanotubes, thereby enabling insertion of an active substance into the inner walls of the carbon nanotubes and increasing the insertion efficiency.

Abstract: A method for driving a field emission device (FED) applies an alternating (AC) voltage as a driving voltage for emitting electrons in a field emission device comprising cathode electrode including an emitter and an anode electrode facing the cathode electrode. A method for aging an FED uses a constant voltage so that electrons cannot be emitted from the electron emission source, and an AC voltage so that electrons can be periodically emitted from the emitter when the FED is aged.

Abstract: A composite anode active material, a method of preparing the composite anode active material, and a lithium battery including the lithium battery. According to the method of preparing the composite anode active material, carbon nanotubes are formed on a Si particle without a separate operation of applying a catalyst. Furthermore, high adherence is provided between the Si particle and carbon nanotubes, and therefore the composite anode active material is used as an anode material of the lithium battery.

Abstract: A carbon nanotube, a method of preparing the same, a supported catalyst including the same, and a fuel cell using the supported catalyst are provided. The method of preparing the carbon nanotube includes: depositing a metal catalyst in single wall nanotubes and growing multi wall nanotubes over the single wall nanotubes using the metal catalyst. The carbon nanotubes of the present invention have satisfactory specific surface area and low surface resistance. Thus, the carbon nanotubes perform remarkably better than a conventional catalyst carrier. Accordingly, the carbon nanotubes, when used as a catalyst carrier of an electrode for a fuel cell, can improve the electrical conductivity of the fuel cell. In addition, a fuel cell employing the electrode has excellent efficiency and overall performance.

Abstract: Provided are a method of coating a catalyst metal layer by using a nucleic acid, and a method of forming nanocarbon using the method of coating a catalyst metal layer. The method of coating a catalyst metal layer includes preparing an aqueous solution; the aqueous solution including ions of a transition metal and a nucleic acid; disposing a carbon matrix including carbon, in the aqueous solution, and disposing a catalyst metal layer including a transition metal on a surface of the carbon matrix.

Abstract: A composite anode active material including metal core particles and carbon nanotubes that are covalently bound to the metal core particles, an anode including the composite anode active material, a lithium battery employing the anode, and a method of preparing the composite anode active material.

Abstract: Provided are a carbon fiber including a carbon fiber core coated with a metal oxide film, and a light-emitting device including the carbon fiber. A method of manufacturing the carbon fiber is disclosed.

Abstract: A field electron emitter includes a thin film layer including a carbon nanotube (“CNT”) disposed on a substrate, wherein the thin film layer includes nucleic acid.

Abstract: A field electron emitter including a metal electrode; and a plurality of carbon nanotubes, wherein a portion of the plurality of carbon nanotubes protrude from a surface of the metal electrode and a portion of the plurality of carbon nanotubes are in the metal electrode. Also disclosed is a field electron emission device including the field electron emitter and a method of manufacturing the field electron emitter.

Abstract: A negative active material, a negative electrode including the negative active material, a method of manufacturing the negative electrode, and a lithium battery including the negative electrode. The negative active material includes a composite including a non-carbonaceous material, carbon nanotubes (CNTs), and carbon nanoparticles. The carbon nanoparticles are formed by carbonizing a polymer of carbonizable monomers.

Abstract: An anode active material for lithium batteries, an anode including the anode active material, a method of manufacturing the anode, and a lithium battery including the anode. The anode active material includes secondary particles formed of agglomerated primary nanoparticles. The primary nanoparticles include a non-carbonaceous material bound with hollow carbon nanofibers. The anode includes the anode active material and a polymeric binder having an electron donor group.

Abstract: A method of fabricating spacers for use in a flat panel device includes: preparing a core glass having a low solubility in a chemical etching solution and a tube glass having a high solubility in the chemical etching solution and having a larger inner diameter than an outer diameter of the core glass; inserting the core glass into the tube glass to obtain a cylindrical glass; drawing the cylindrical glass at a predetermined temperature until the core glass has a predetermined diameter; cutting the drawn cylindrical glass to a predetermined length; and removing the tube glass in the cylindrical glass using the chemical etching solution.

Abstract: Disclosed is a method for fabricating ZnO thin films using a ZnO precursor solution containing zinc hydroxide nitrate (Zn5(OH)8(NO3)2.2H2O) as a zinc supplier. The ZnO thin film is fabricated by using a simple and economical coating method at a low process temperature.

Abstract: A method of forming emitters and a method of manufacturing a Field Emission Device (FED) using the method includes: forming a volume-changeable structure on an electrode, the volume-changeable structure composed of a polymer which reversibly swells and shrinks in response to an external stimulus; injecting an electron-emitting material into the volume-changeable structure; aligning the electron-emitting material; and removing the polymer to form the emitters.

Abstract: A carbon nanotube (“CNT”) gas sensor includes a substrate, an insulating layer formed on the substrate, electrodes formed on the insulating layer, and CNT barriers that protrude higher than the electrodes in spaces between the electrodes to form gas detecting spaces. A method of manufacturing the gas sensor includes forming an insulating layer on a substrate, forming an electrode pattern on the insulating layer, coating CNT paste having a thickness greater than a thickness of electrodes in the electrode pattern on the electrodes and the insulating layer, and patterning and firing the carbon nanotube paste, including using a photolithography method, to retain only portions of the CNT paste coated on spaces between the electrodes.

Abstract: A flat panel display includes: an electron emission portion to emit electrons frontward; and a light emission portion, arranged on a front portion of the electron emission portion, to emit visible light rays frontward; the light emission portion including: a transparent front substrate to project the visible light rays toward the front portion; a phosphor layer arranged on a rear surface of the front substrate, the phosphor layer emitting visible light upon receiving electrons emitted from the electron emission portion; and a flat metal reflective layer arranged between the phosphor layer and the electron emission portion.

Abstract: A transfer film includes an organic film that can be removed using a solvent and a metal film formed on the organic film. The metal film is formed by: preparing a first substrate; forming a transfer film by stacking an organic film and a metal film on the first substrate; separating the transfer film from the first substrate; bonding the transfer film separated from the first substrate to a second substrate by arranging the metal film to face the second substrate; and removing the organic film from the metal film using a solvent.

Abstract: An electroluminescent device uses nano structures having a wide surface area. The electroluminescent device includes a substrate, a first electrode having a plurality of nano structures formed on an upper surface of the substrate, a dielectric layer formed so as to correspond to the shape of the nano structures, a light emitting layer formed so as to correspond to the shape of the dielectric layer, and a second electrode covering the light emitting layer. A surface of the second electrode facing the light emitting layer is separated by a predetermined distance from a surface of the nano structures.

Abstract: A method for driving a field emission device (FED) applies an alternating (AC) voltage as a driving voltage for emitting electrons in a field emission device comprising cathode electrode including an emitter and an anode electrode facing the cathode electrode. A method for aging an FED uses a constant voltage so that electrons cannot be emitted from the electron emission source, and an AC voltage so that electrons can be periodically emitted from the emitter when the FED is aged.

Abstract: Provided are a photovoltaic device and a lamp and a display device using the same. The photovoltaic device includes a substrate; a conductive electric field enhanced layer including a plurality of partial electric field crowding end portions disposed on the substrate; an electron amplification layer disposed on the electric field enhanced layer and formed of a material that emits secondary electrons; and a photoelectric material layer disposed on the electron amplification layer. The photovoltaic device can be applied to various fields and used as a light emitting display device (OLED) to generate light with high luminance at a low voltage.