Abstract:
본 발명은 키토산-폴리아닐린 복합체를 이용한 가스센서 및 그의 제조방법에 관한 것으로, 상기 제조방법에 따른 가스센스는 나노파이버 형태의 나노 구조체를 제조하여 이용함으로써 기존의 막 형태의 전도성 고분자 가스센서에 비해 가스 센서의 감도를 향상 시킬 수 있을 뿐 아니라 키토산 코팅층이 표면에 형성된 나노 구조체를 포함하는 감지체를 구비함으로써 키토산 고분자의 사슬간 및 사슬내의 간격에 따라 다양한 종류의 분자 크기를 갖는 특정 가스 분자를 선택적으로 검출할 수 있는 장점이 있다.
Abstract:
A method for manufacturing carbon nanotubes for field emission devices and carbon nanotubes for field emission device obtained from this method are provided to simplify the manufacturing process by adhering the carbon nanotube on the substrate by using an arc discharging. The arc discharging is performed on a substrate in an arc discharge chamber. The carbon nanotube is arranged on the substrate by the arc discharging. Here, impurities of the carbon nanotube are strongly combined to the wall and end part. The substrate is processed in an organic solvent and the carbon nanotube is horizontally arranged. The substrate is heat-treated, the organic solvent is removed and the impurity is exposed. The carbon nanotube is perpendicularly arranged on the substrate.
Abstract:
The present invention relates to a method for preparing a metal oxide-carbon nanotube composite and a working electrode for a nonenzymatic glucose biosensor using the metal oxide-carbon nanotube composite prepared by the same method, wherein the method includes (A) a step of preparing a source comprising a mixture of graphite and a metal oxide precursor, (B) a step of manufacturing a metal-carbon nanotube composite through an arc discharge method using the source, and (C) a step of manufacturing a metal oxide-carbon nanotube composite by thermally treating the metal-carbon nanotube composite. [Reference numerals] (AA) Example 1; (BB) Comparative example 2; (CC,FF) Comparative example 1; (DD) Example 2; (EE) Comparative example 3
Abstract:
A method for preparing a triode type carbon nano tube for field emission device is provided to prevent leakage current by forming an electrical insulating state between a grown carbon nano-tube and a gate electrode. An AAO(Anodic Aluminum Oxide) is grown on an Si substrate. A shadow layer is selectively deposited on the AAO. Micro-pores are partially exposed by shadowing partially the AAO. A carbon nano-tube is grown in a non-shadow space by using a thermally chemical vapor phase-synthesis method or a plasma chemical vapor phase-synthesis method. A first insulating layer is deposited on the substrate. A gate electrode layer is deposited only on the first insulating layer having the shadow layer. A second insulating layer is deposited on the gate electrode layer. The carbon nano-tube is formed by performing a selective etch process using a chemical or physical etch method.
Abstract:
PURPOSE: A method for synthesizing a carbon nano-tube using ferrofluid is provided to reduce the manufacturing cost, to obtain the uniform carbon nano-tubes having the same quality, and to improve the product quality and productivity. CONSTITUTION: The method for synthesizing a carbon nano-tube by thermo-chemical vapor deposition using a ferrofluid is characterized by comprising the steps of: forming a metal catalyst using a ferrofluid; coating the metal catalyst on a substrate; and synthesizing the carbon nano-tube. The method has no need of a heat treatment step as a pre-treatment. More particularly, the step of forming a metal catalyst optionally further comprises the step of introducing a binder into the metal catalyst. Further, the ferrofluid is made from iron chlorides.
Abstract:
PURPOSE: A production method of nanostructure is provided to efficiently produce a nanostructure with a three dimensional form which has multidirectional property and a high fitness ratio by growing nanorods at a low temperature and atmospheric pressure using a substrate on which spherical particles are arranged. CONSTITUTION: A production method of nanostructure contains the following steps; (a) spherical particles (102) are arrange on a substrate (101); (b) a metal see layer (103) is formed on the spherical particles; (c) a metal oxide layer (104) is formed by treating the substrate, on which the metal seed layer is formed, with heat; and (d) multiple nanorods (105) are grown immersing the substrate, on which the metal oxide layer is formed, into a aqueous growth solution. The spherical particles are removed as the substrate with the metal seed layer is treated with heat. A heat treatment temperature of the substrate with the metal seed layer is 200-600 degree C. The aqueous growth solution is a solution in which metallic salt precursors and a metal ion containment agent are dispersed in a solvent. A temperature of the aqueous growth solution is 70-100 degreeC. The nanostructure is produced in atmospheric pressure.
Abstract:
본 발명은 탄소나노튜브 필름의 기판간 접합력을 개선시키고 탄소나노튜브 필름내 탄소나노튜브간 전기적 접합 저항을 저감시키는 방법과, 이로부터 얻어진 전기전도도 및 광 투과율이 우수한 탄소나노튜브 필름을 이용하여 전자 소자 및 광 투과형 전극을 제조하는 방법에 관한 것으로, 아크 방전을 이용하여 탄소나노튜브가 흡착된 기판을 제조한 다음 상기 기판상에 유기 용매로 표면처리하여 탄소나노튜브가 수평 배열된 탄소나노튜브 필름을 제작하고, 얻어진 탄소나노튜브 필름을 산화성 가스 분위기 하에 온도를 올려 비정질 탄소 및 탄소나노튜브 이외의 탄소 나노 입자들을 제거하고 산성 용액으로 촉매 금속 입자들을 제거하여 전기전도도 및 광 투과율을 개선시키며, 나아가 포토레지스트 코팅, 노광 고정, SOG 도포, 박막 증착 공정을 통해 전자 소자 제작이 가능하며, 미세 패턴 형태의 전극을 제조하는 것으로 구성되어 있다. 본 발명의 방법에 따르면, 탄소나노튜브 필름 제작과 함께 탄소나노튜브의 수평 배열을 도입하여 대면적화가 가능할 뿐 아니라 간단하고 저렴한 방법에 의해 탄소나노튜브 필름의 전기전도도 및 광 투과율을 개선시킬 수 있다. 또한, 이렇게 표면처리된 탄소나노튜브필름은 전자파 차폐, 전기화학적 저장장치(2차 전지, 연료 전지 또는 수퍼 캐패시터)의 전극, 광 투과형 전극뿐만 아니라, 탄소나노튜브 트랜지스터, 센서 소자 및 유무기 오염원에 대한 선택적 흡착 성능을 발휘할 수 있는 필터에 사용될 수 있다. 탄소나노튜브 필름, 수평 배열, 유기용매, 전기전도도, 광 투과율
Abstract:
A method for manufacturing a carbon nano-tube field emission device by using electro-deposition and a carbon nano-tube field emission device manufactured thereby are provided to enhance electrical/mechanical coherence between a carbon nano-tube and a metal electrode by growing a carbon nano-tube/metal composite on a metal electrode. A carbon nano-tube dispersion process is performed to disperse a carbon nano-tube into a metallic electrolyte of an electroplating device. A growing process is performed to couple the carbon nano-tube and metallic particles in order to grow a carbon nano-tube/metal composite on the metal electrode by applying current to a metal electrode and a relative electrode of the electroplating device. A carbon nano-tube forming process is performed to form the carbon nano-tube by etching chemically the carbon nano-tube/metal composite grown on the metal electrode.
Abstract:
A method for synthesizing carbon nanotubes is provided to synthesize continuously carbon nanotubes without lowering temperature of a synthesis furnace during the deposition by dissolving ferrocene or thiophene as a catalytic metal into an n-hexane solvent as a carbon atom source using a thermochemical vapor deposition process. A method for synthesizing carbon nanotubes comprises: mixing a catalytic metal source such as ferrocene(Fe(C2H2)5) or thiophene with an organic solvent such as n-hexane, acetone or methanol to prepare a mixed solution of a catalytic metal and hydrocarbon; and injecting the mixed solution into a supply source of a carbon nanotube synthesizing apparatus and growing carbon nanotubes while maintaining temperature inside a reactor to 900 deg.C. A method for synthesizing carbon nanotubes comprises: mixing NiSO4.6H2O, FeSO4.6H2O, NiCl2.4H2O, FeCl2.4H2O or thiophene with an organic solvent such as ethanol to prepare a mixed solution of a catalytic metal and hydrocarbon; and injecting the mixed solution into a supply source of a carbon nanotube synthesizing apparatus and growing carbon nanotubes while maintaining temperature inside a reactor to 1200 deg.C to prepare carbon nanotubes.