Abstract:
본 발명은 전기 전도성이 높은 그래핀을 이산화티타늄 나노섬유에 도입하여 이산화티타늄-그래핀 다공성 나노섬유를 제조하였다. 이는 기존의 이산화티타늄 나노섬유보다 전자 전달 속도가 더 빨라질 뿐만 아니라, 산화그래핀 내의 수산기, 카르복실기에서의 이산화티타늄의 추가적인 결정핵 생성에 의해 이산화티타늄의 낱알의 개수가 증가하고 이산화티타늄의 낱알 크기가 감소함으로써 나노섬유의 표면적이 획기적으로 향상되어 염료의 흡착량이 증가할 수 있음을 확인하였다. 이를 염료감응형 태양전지에 적용시 광전극의 태양광 이용률과 광전환 효율의 향상을 기대할 수 있게 하였다.
Abstract:
본 발명은 은 나노 입자를 함유한 양이온성 고분자 나노 섬유 제조에 관한 것으로서, 폴리비닐알코올(polyvinyl alcohol)이 존재하는 수용액 상에 일정량의 은 이온을 전단력(shear force) 하에 녹인 후, 라디칼 개시제(radical initiator)를 도입하여 은 이온의 환원을 유도한 뒤, 양이온성 고분자 단량체를 주입하여 적정 온도와 시간에서 라디칼 매개 분산 중합(radical mediated dispersion polymerization)을 이용하여 은 나노 입자를 함유한 양이온성 고분자 나노 섬유를 제조하는 방법을 제공한다. 본 발명에 따르면, 간단하고 저렴한 공정을 이용하여 은 나노 입자를 함유한 양이온성 고분자 나노 섬유를 용이하게 제조할 수 있으며, 효과적으로 은 나노 입자를 고분자 나노 섬유 내에 포함하기 위하여 추가적인 개질 공정이나 개질제가 요구되지 않는다는 장점을 가진다. 또한 본 발명을 통해 제조될 수 있는 은 나노 입자를 함유한 양이온성 고분자 나노 섬유는 은 나노 입자의 선처리 공정이 필요없을 뿐 아니라, 은 이온을 사용함으로써 제조 과정이 단순하며, 양이온성 고분자 나노 섬유의 종류 및 두께에 제한 없이 제조가 가능하다. 더욱이, 본 발명에서 제조될 수 있는 은 나노 입자를 함유한 양이온성 고분자 나노 섬유는 양이온성 고분자 나노 섬유의 회수가 매우 용이하다는 장점을 갖는다. 그리고 만들어진 은 나노 입자를 함유한 양이온성 고분자 나노 섬유는 기존의 은 나노 입자를 함유한 고분자 나노 섬유보다 더욱 향상되고 지속적인 항균 효과를 나타낼 수 있다.
Abstract:
The present invention relates to a method for manufacturing a field-effect transistor type aptasensor using graphene doped with nitrogen having aptamer. The disclosed method is to detect an angiogenesis factor by transferring nitrogen doped graphene having excellent electrical properties manufactured from a conductive polymer onto a glass substrate, by fixating an antineoplastic angiogenesis factor aptamer having high affinity with the angiogenesis factor to the graphene through covalent bonding, and by monitoring current changes inside a liquid-ion gate field-effect transistor array in real time. According to the present invention, the disclosed method can easily manufacture nitrogen doped graphene with high conductivity using a simple and effective screen printing and vapor deposition polymerization. In addition, the manufactured nitrogen doped graphene is transferred to a glass substrate in order to maintain electrical contact through deposition of a metal electrode, and an aptamer can be stably introduced onto the surface of the graphene through chemical bonding. The aptamer can induce the accumulation and reduction of a charge carrier inside the graphene through reaction to a specific target material, and can provide improved sensitivity and real-time reaction because the interaction with an object to be analyzed is increased by the electrical properties of the graphene having high conductivity.
Abstract:
The present invention relates to a method for producing FRET-based dye-sensitized solar cells using water-dispersible quantum dots as donors to fluorescence resonance energy transition phenomenon (FRET), in particular, to a method for producing FRET-based dye-sensitized solar cells including water-dispersible quantum dots presenting high conversion efficiency and improved light sensitivity in a wide wavelength range of sunlight by introducing dye and FRET phenomenon between quantum dots and the dye after introducing quantum dots stabilized by citrate (citrate) ligands on the surface of the quantum dots to the titanium dioxide / FTO (Fluorine-doped Tin Oxide) electrodes. According to the present invention, the method has the advantage of expressing into the optimum environment FRET by freely adjusting the amount of water-dispersible quantum dots introduced to the emission wavelength range and the layer of nano-porous titanium dioxide. In addition, the method improves the contact between donor and acceptor by introducing water-dispersible quantum dots into the layer of nano-porous titanium dioxide to markedly enhance dispersibility. The present invention simplifies the process since the hydrophobic ligand substitution step, which was added when there was a problem in the previous approach method, is not necessary, and prevents fluorescent energy from reducing during the ligand substitution processes. [Reference numerals] (AA) Electrolyte; (BB) Quantum dot; (CC) Titanium dioxide; (DD) N719 dye
Abstract:
PURPOSE: A method for manufacturing a porous PANI/CSA nanostructure and a method for applying the porous PANI/CSA nanostructure to a dye-sensitized solar cell with high performance are provided to easily form a pore with a desired shape and a desired size on a conductive polymer thin film by using conductive PANI/CSA solutions and various kinds of porogens. CONSTITUTION: A conductive polymer with a porogen is dispersed and refined in organic solutions. A porous conductive polymer nanostructure is manufactured by coating the conductive polymer solution on a glass supporter with a thin film type. The conductive polymer nanostructure is assembled as an opposite electrode for a dye-sensitized solar cell. The pore size of the conductive polymer nanostructure is 1 to 1000 nm. [Reference numerals] (AA,CC,EE,GG) Height/nm; (BB,DD,FF,HH) Distance/um
Abstract:
PURPOSE: A manufacturing method of nanofluid is provided to improve the thermal conductivity and dispersion stability of the nanofluid using graphene, which is reduced by a mechanical mixing operation, as filler. CONSTITUTION: A manufacturing method of nanofluid includes the steps of: manufacturing a graphene oxide solution by dispersing graphene oxide into a solvent; and mechanically mixing the graphene oxide solution to be reduced into reduced graphene. The solvent is based on water or ethylene glycol. The mass ratio of the graphene oxide in the graphene oxide solution is in a range of 0.001-0.1 with respect to the solvent. The speed of the mechanical mixing operation is 10000-20000rpm, and the duration of the operation is from 10 minutes to 2 hours.
Abstract:
PURPOSE: A graphene sheet using inkjet printing and a wideband dipole antenna application are provided to minimize the loss of raw material and time. CONSTITUTION: Waterborne graphene oxide nano particle solution is manufactured and is used for conductive ink of inkjet printing. The chemical characteristic of the waterborne graphene oxide nano particle solution is changed in order to form a detailed pattern on a supporting material. The waterborne graphene oxide nano particle solution is injected to a printer head, and an oxide graphene thin film is formed. The supporting material including the oxide graphene thin film is located in a vapor deposition reactor, and an oxidation-reduction reaction is executed. A graphene sheet based broadband dipole antenna electrode is connected to an antenna analysis device, and the performance of the antenna is measured.
Abstract:
본 발명은 이산화주석 나노입자를 함유하는 이산화티타늄 나노섬유의 제조와 자외선에 반응하는 광 촉매로서의 응용에 관한 것으로, 이산화티타늄 전구체와 이산화주석 전구체 혼합용액을 전기방사법으로 나노섬유를 방사한 뒤, 가수분해 과정과 열처리과정을 통해 이산화주석 나노입자를 함유하는 이산화티타늄 나노섬유를 제조하는 방법을 제공하며, 광 촉매로 이용되었을 경우 우수한 유기물 분해 성능을 보임으로 차세대 광 촉매로의 기능성을 제시하였다. 본 발명에 따르면, 간단하고 저렴한 전기방사와 그 후 열처리를 통해 이산화주석 나노입자를 함유하는 이산화티타늄 나노섬유를 용이하게 제조할 수 있는 장점을 가진다. 더욱이, 본 발명에서 제조될 수 있는 이산화주석 나노입자를 함유하는 이산화티타늄 나노섬유는 이산화주석 나노입자의 양을 쉽게 조절할 뿐만 아니라, 이산화티타늄 전구체와 이산화주석 전구체 종류에 제한 없이 제조가 가능하다.
Abstract:
PURPOSE: A manufacturing method of nano-particles for non-label bio-image using polyacrylonitrile nano-particles on which target-oriented molecules are attached is provided to manufacture polymer nano-particles which can be used for agent for bio-images without additional fluorophore addition. CONSTITUTION: A manufacturing method of nano-particles for non-label bio-image using polyacrylonitrile nano-particles on which target-oriented molecules are attached comprises the following steps: manufacturing polyacrylo nitrile nano-particles having photo luminescent character of 10-50 nano meters by microemulsion polymerization using surfactant under ultrasonic wave; introducing various functional groups to surfaces of the nano-particles through a vapor deposition method; fixing target directive molecule in the functional group of nano-particles; and applying the nano-particles to the bio-image agent for imaging targeted specific cell.