Abstract:
PURPOSE: A memory device consisting of one graphene transistor and a method for manufacturing and operating the same are provided to perform a high speed operation by using a graphene channel. CONSTITUTION: A first, a second, and a third electrode are separated from each other. A graphene layer (34) is in contact with the second and the third electrode. The graphene layer is insulated from the first electrode. The graphene layer is a memory layer. The graphene layer has the density of charge trap sites.
Abstract:
PURPOSE: A manufacturing method of a metal oxide thin film on a graphene is provided to manufacture a metal oxide thin film having an excellent crystallization and conductivity at any temperature without any damage of a grapheme. CONSTITUTION: A manufacturing method of a metal oxide thin films on a graphene comprises the step of obtaining a metal precursor solution by dissolving a metal precursor compound in a low-boiling point solvent, the step of obtaining a liquid drop dispersed in which metal oxide precursors are dispersed in a solvent by the ultrasonic treatment of the metal precursor solution, and the step of absorbing the liquid drop into a graphene wherein the liquid drop sis supplied by a carrier gas into a chamber containing a graphene. The metal precursor compound is at least one kind selected from a group composed of metal acetate, chloride, nitrate and acetic anhydride. The metal precursor compound is at least one kind from a group composed of zinc, copper, aluminum, tin and magnesium. The solvent is water or the low-boiling point solvent. The low-boiling point solvent is at least one kind selected from ethanol and methanol.
Abstract:
PURPOSE: A manufacturing method of graphene is provided to prevent problems in degree of task difficulty due to blocking of a work place by inserting a mesh which has a smaller wire netting than a fluidized bed microbial carrier into a fluidized bed biofilter cask by putting around perimeter of a corporate body. CONSTITUTION: A manufacturing method of graphene comprises the following steps. A mesh(4) with a wire netting smaller than a fluidized bed microbial carrier is inserted into a fluidized bed biofilter cask by wrapping around the perimeter of a combination. The combination comprises a partition and three or more of steel materials(2). The partition(1) is arranged with punched holes which are perpendicular to the height of the fluidized bed biofilter with constant interval of each shift height of the fluidized bed biofilter. The steel materials have the length of the same height of the fluidized bed biofilter which are arranged with constant interval near to edge of partition, and the width of 1-5% of the height.
Abstract:
PURPOSE: A graphene layered structure, a manufacturing method thereof and a transparent electrode and transistor comprising the same are provided to not need separate transcription process and to prevent damages of graphene by directly growing the graphene on an insulator. CONSTITUTION: A manufacturing method of a graphene layered structure comprises: a step of injecting at least one kind of gas ions selected from a nitrogen ion(2) and an oxygen ion, into the surface of a silicon carbide thin film(1) to forming an ion injection layer inside the silicon carbide thin film; a step of heat-treating the silicon carbide thin film for graphenization of the carbide thin film surface layer. The ion injection layer is a nitride silicon layer. The thickness of the ion injection layer is 230 nm or less. The heat-treatment is conducted at 1,000-2,000°C for 0.001-10 hours.
Abstract:
PURPOSE: Ultra-hydrophobic graphene and a method for manufacturing the same are provided to improve the conductivity of graphene and to improve the contact angle of the graphene with respect to water by forming a plurality of protruding parts to the graphene. CONSTITUTION: Ultra-hydrophobic graphene includes a plurality of protruding parts. The protruding parts are formed into one shape of a hemi spherical shape, a cylinder shape, a prism shape, or a pyramid shape. The protruding parts occupy about 20 to 80% of the entire surface area of the graphene. The average height of the protruding parts is between about 1um and about 10mm. The average diameter of the protruding parts is between about 0.1um and about 1000um. The intervals of the protruding parts are between about 0.1um and about 1000um. The contact of the graphene with respect to water is between about 90 degrees and about 170 degrees.
Abstract:
PURPOSE: A method for manufacturing graphene laminate is provided to firmly bind graphene and a substrate and to minimize defect. CONSTITUTION: A graphene laminate contains: a substrate; a binder layer formed on the substrate; and graphene formed on the binder layer. The substrate and graphene are combined by the binder layer. The binder layer is harden from room temperature curable resin, thermosetting resin, hot-melt resin, or pressure sensitive resin. A method for manufacturing the graphene laminate comprises: a step of forming the graphene on a graphite catalyst metal film; a applying a composition for forming the binder layer on one side of the substrate; a step of contacting the substrate and graphite catalyst metal film; a step of hardening the composition to form binder layer; and a step of removing the graphite catalyst metal film.
Abstract:
PURPOSE: A doping method of a transistor comprising carbon nano tube is provided to easily manufacture a p-type transistor and an n-type transistor according to needs. CONSTITUTION: A field effect transistor(200) includes a source, a drain, a carbon nano tube, and a gate. The carbon nano tube is a channel of the source and the drain. A first voltage is applied to the gate. An ion is absorbed on a surface of the carbon nano tube(20). In the absorbing step, nitronium hexafluoro antimonate solution is contacted on the surface of the carbon nano tube. The solution which is not absorbed on the surface of the carbon nano tube is removed. The ion is absorbed on the surface of the carbon nano tube by drying the substrate.
Abstract:
A carbon nanotube(CNT) in which electronic is injected is provided to control easily doping of the carbon nanotube and electrical property such as band-gap etc. by diversifying treatment condition of reducing agent. A carbon nanotube(CNT) in which electronic is injected is generated using a reducing agent, and p-type doped CNT, neutral doped CNT, n-type doped CNT and a mixture thereof. An optical extinction rate of S11/S22 is 0.5 or greater. The reducing agent is a metal hydride, an organic reduction solvent or a hydrogen gas. The metal hydride is a borohydride system or an aluminum hydride. The organic reduction solvent is a hydrazine(N2H4), a glycol or a diol solvent.
Abstract:
A transparent electrode having a CNT(Carbon Nano Tube) and a method for manufacturing the transparent electrode are provided to improve electrical conductivity of the transparent electrode by increasing an amount of defects of the CNT. A transparent electrode includes a CNT, whose ID/IG value is greater than 0.25. The ID and IG are integration values on D and G bands, respectively, which are obtained by adopting a Raman spectroscopy. The ID/IG value of the CNT lies between 0.25 and 1.00. The CNT is a single-wall CNT, a thin multi-wall CNT, a multi-wall CNT, or a combination thereof. A mean length of the CNT lies between 0.1 and 500 mum. A solar cell includes a semiconductor electrode(10), an electrolyte layer(13), and a counter electrode(14).