Korea Advanced Institute of Science and Technology

Jeung-Ku Kang

Jung-woo Lee

Kyu-Sung Han

Kyung-Min Choi

Jung-Hoon Choi

Se-Yun Kim

Weon-Ho Shin

Hyun-Seok Kim

Dong-Ki Lee

Seong-Ho Yang

Yeob Lee

Jai-Young Lee

Jun-Hyeon Bae

Hyung-Mo Jeong

Weon-Ho Sin

Yong-mook Kang

Jung-Woo Lee

Il Woo Ock

Yoon-Jung Choi

Ravindranath Viswan

Cheol-Ock Song

Hyung-Joon Jeon

Yoon-Jeong Choi

Jung-Hyo Park

Augustine Saji

Jun-Ho Kwon

Seung-Jun Heo

Hang-Ah Park

Disclosed is an energy storage device based on metal oxide nanocrystals resealed through lithiation, and a supercapacitor using the same. The energy storage device is fabricated by dispersing transition metal nanoparticles over a carbon-based support with a large specific surface area, and then, dispersing and resealing the nanoparticles over the support using lithium ions with strong reductive ability, so that the resealed metal particles are substantially particles dispersed and resealed over the support as particles having a size of less than 1 nanometer on the scale of atomic units. The supercapacitor is fabricated using the energy storage device. The energy storage device higher capacitance than before resealing of metal oxide. Since the resealed metal particles are those having a size of less than 1 nanometer on the scale of atomic units, interference between particles disappears to exhibit excellent cycle life characteristics of 100% maintained performance in even more than 100,000 cycles.

Energy storage device based on nanocrystals including metal oxide rescaled by lithiation and supercapacitor using the same

A semiconductor of which a substance such as a semiconductor photocatalyst is uniformly coated on the surface thereof with a graphitic carbon film and a method of fabricating the same are disclosed. According to the inventive method, a graphitic carbon film having a thickness of 1 nm or less is uniformly formed on the surface of the semiconductor by performing hydrothermal synthesis and pyrolysis on glucose, so as to keep the original structure crystallinity of the semiconductor photocatalyst to be a support of the carbon film.

Semiconductor photocatalyst coated with graphitic carbon film and method of fabricating the same

Disclosed is a method for patterning a nanomaterial using solution evaporation. More particularly, the method for patterning a nanomaterial using solution evaporation includes; coating the nanomaterial with a polymer material and uniformly dispersing the coated nanomaterial in a solvent to prepare a solution containing the nanomaterial, and pouring the nanomaterial-containing solution on a substrate, enabling the nanomaterial to be patterned after evaporation of the solvent.

Method for patterning nanomaterial using solution evaporation

The present invention relates to preparation of porous gallium (III) oxide [GaO] photocatalyst for production of hydrocarbons a porous gallium oxide photocatalyst for production of hydrocarbons, manufactured by the foregoing method, and a process of producing hydrocarbons using the porous gallium oxide photocatalyst for production of hydrocarbons, manufactured by the foregoing method.

Method of manufacturing a porous gallium (III) oxide photocatalyst for preparation of hydrocarbons

The present inventions are a method for production of hydrogen which decomposes water into hydrogen by oxidation of metals only when the metals are exposed to the water, while preventing oxidation of pure metal nanoparticles using block copolymers and, in addition, hydrogen produced by the method described above. The method of the present invention has advantages of improved convenience and simplicity, achieves a preferable approach for hydrogen storage because the metal nanoparticles enclosed by the block copolymer have the ease of delivery and reaction thereof. Additionally, the method of the present invention only using water and the metal is considered eco-friendly and useful in industrial energy applications.

Method for producing hydrogen using block copolymer and oxidation reaction of metals

Disclosed is a method for synthesis of micro-porous triple-bond based polymer networks using acetylene gas. According to the disclosed methods for synthesis of micro-porous triple-bond based polymer networks, acetylene gas interconnects building units having iodine and/or bromine functional groups by coupling reactions to provide micro-porous triple-bond based polymer networks.

Facile synthesis of microporous triple-bond based polymer networks using acetylene gas as a building unit

TiON(0.01&#x2266;x&#x2266;0.2) nanotubes and a method for preparing the same are disclosed. More particularly, TiON(0.01&#x2266;x&#x2266;0.2) nanotubes doped with nitrogen atoms by treating TiOnanotubes through nitrogen plasma to partially substitute oxygen portion of TiOnanotube with nitrogen, and a method for preparing the same are disclosed. The TiON(0.01&#x2266;x&#x2266;0.2) nanotube of the present invention is prepared by doping nitrogen on a TiOnanotube to control an electronic structure and reduce a band gap of the TiOnanotube, so that the prepared TiON(0.01&#x2266;x&#x2266;0.2) nanotube exhibits improved conductivity and extended light absorption range from a UV ray area up to a visible light area, thus having more enhanced applicable performance in optical and/or electrochemical aspects.

[object Object]

Disclosed are a nanocrater catalyst in metal nanoparticles with a nanocrater form of hole structure in center of the catalyst which is useful for manufacturing nano-sized materials and/or articles with desired structure and characteristics, a preparation method thereof including a plasma etching and chemical etching process ('PTCE process'), and nano-sized materials and/or articles manufactured by using the nanocrater catalyst in metal nanoparticles.

Nanocrater catalyst in metal nanoparticles and method for preparing the same

Disclosed is a method for preparation of a nickel-carbonitride sphere, which includes preparing a melamine-formaldehyde resin, adding a nickel salt and a surfactant to the melamine-formaldehyde resin to prepare a nickel-melamine resin mixture, and conducting spray pyrolysis for the mixture to produce nickel-containing powder including nickel-carbonitride spheres. In addition, this method may further include thermal treatment of the nickel-containing powder.

Nickel-carbonitride spheres and method of making the same

The present invention discloses a method for preparation of a hybrid comprising magnetite nanoparticles and carbon nitride nanotubes, comprising: preparing carbon nitride nanotubes by plasma chemical vapor deposition (CVD); dissolving the prepared carbon nitride nanotubes in triethyleneglycol to form solution and adding Fe (acetylacetonate)to the solution to obtain a mixture; and heating and cooling the mixture to form a hybrid comprising magnetite nanoparticles and carbon nitride nanotubes, in which the carbon nitride nanotubes are doped with magnetite nanoparticles.

Method for preparation of hybrid comprising magnetite nanoparticles and carbon nitride nanotubes

The present invention relates to a method for manufacturing a transition metal-carbon nanotube hybrid material using nitrogen as a medium. The present invention is characterized in that nitrogen-added carbon nanotube is grown in the presence of metal catalyst particles by reacting an hydrocarbon gas with a nitrogen gas by a chemical vapor deposition (CVD) and a transition metal-carbon nanotube hybrid material where a transition metal is uniformly attached to the entire carbon nanotube structure in which nitrogen with a great chemical reactivity is added as heterogeneous elements is chemically manufactured. Therefore, the present invention does not use an acid treatment required to attach transition-metal atoms to the carbon-nanotube, a surface treating process using a surfactant and the like and an inhibitor for preventing the coagulation of the transition metal so that a simplification of the process is obtained and the method is an environment-friendly method. The transition metal-carbon nanotube hybrid material manufactured by the above can be applied variously as a hydrogen storage material, a catalyst material, an electric field emission device and an electrode material.

Nitrogen-mediated manufacturing method of transition metal-carbon nanotube hybrid materials

The present application provides a CNnanotube with pores having nano-sized diameter ranging from 5 to 10 &#x212b;, where x ranges from 0.001 to 0.2, and a method for controlling the size and quantity of pores in said nanotube by reacting hydrocarbon gas, nitrogen gas, and oxygen gas or hydrogen gas together in the presence of metal catalyst and by controlling the concentration of nitrogen gas.

Carbonnitride nanotubes with nano-sized pores on their stems, their preparation method and control method of size and quantity of pore thereof

Disclosed are carbon nitride (CN) nanotubes with nano-sized pores on their stems, their preparation method and control method of size and quantity of pores thereof. The present invention further has an object of providing the CNnanotube with pores having the size of not more than 1 nm over structure of the nanotube and a method for preparing the same. Another object of the present invention is to provide the control method of the size and quantity of pores with size of not more than 1 nm in the preparation of the CNnanotube with the pores over structure of the nanotube. The present invention can produce the CNnanotube with nano-sized pores by reacting hydrocarbon gas and nitrogen gas through plasma CVD in the presence of metal catalyst particles, wherein x ranges from 0.001 to 0.2.

Growing community of inventors

Daejeon, South Korea

Jeung-Ku Kang