Abstract:
본원은, 알칼리 금속 또는 알칼리 토금속 이온을 포함하는 염기성 촉매의 존재 하에 진행되는 첨가 반응 또는 축합 유기 반응을 위한 상전이 (phase transfer) 촉매에 있어서, 상기 상전이 촉매는 산소 작용기를 함유하는 그래핀 옥사이드를 포함하고, 상기 첨가 반응 또는 축합 유기 반응 중 상기 산소 작용기와 상기 알칼리 금속 또는 알칼리 토금속 이온의 결합에 의해 상기 첨가 반응 또는 축합 유기 반응이 촉진되는 것인, 그래핀 옥사이드를 포함하는 상전이 촉매에 관한 것이다.
Abstract:
The present invention relates to a transparent electrode and a manufacturing method thereof. The transparent electrode according to one embodiment of the present invention includes a transparent substrate; a self-assembled monolayer formed on the transparent electrode; a metal nanowire layer formed on the self-assembled monolayer; and a graphene oxide layer formed on the metal nanowire layer.
Abstract:
The present invention relates to a method for manufacturing graphene oxide using waste graphite, which specifically, comprises the steps of sintering powder including graphite and metal; separating waste graphite after the sintered powder is processed with acidification and electrolysis; processing the waste graphite with acidification; and obtaining graphene oxide by making the waste graphite processed with acidification react with an oxidizing agent.
Abstract:
The present invention relates to an optical fiber including graphene oxide and reduced graphen oxide, a method for manufacturing the optical fiber, and a method for manufacturing gas sensor including the same. According to the present invention includes a grapheme oxide (GO) layer and the reduced graphen oxide (rGO) layer. [Reference numerals] (AA) Optical fiber;(BB,LL) GO coating;(CC,HH,MM) Reflected light;(DD,II,NN) Transmitted light;(EE,JJ,OO) Steam;(FF,KK,QQ) Incident light;(GG,PP) rGO coating
Abstract:
PURPOSE: A GO-Gd-DTPA complex and a method for preparing the same are provided to easily and quickly obtain large amounts of GO-Gd-DTPA complex. CONSTITUTION: A GO-Gd-DTPA complex is formed by an ester bond of graphene oxide(GO) and Gd-DTPA(gadopentetic acid). A method for manufacturing the complex comprises: a step of dissolving Gd-DTPA and GO in an organic solvent; a step of treating DCC(dicyclohexylcarbodiimide) and DMAP(dimethylaminopyridine) to Gd-DTPA for esterification; a step of binding Gd-DTPA and graphene oxide in nitrogen gas; and a step of isolating a GO-Gd-DTPA complex using a filter. The organic solvent is DMF(dimethylformamide) or THF(tetrahydrofuran). An MRI contrast composition contains the GO-Gd-DTPA complex.
Abstract:
본 발명은 바닥접촉식 그래핀옥사이드 채널 또는 환원그래핀옥사이드 채널의 전계효과 트랜지스터 제조방법 및 이에 의해 제조된 바닥접촉식 전계효과 트랜지스터를 제공한다. 구체적으로, 본 발명은 기판상에 트랜지스터의 소스 전극과 드레인 전극으로 작용하는 전극을 형성하는 단계; 그래핀 옥사이드 분산 용액을 상기 기판에 도포하여 상기 드레인 전극과 소스 전극의 사이 채널이 형성될 영역에 그래핀옥사이드를 흡착시키는 단계; 및 상기 흡착된 그래핀옥사이드를 환원시키는 단계를 포함하는 바닥접촉식 전계효과 트랜지스터의 제조방법을 제공한다.
Abstract:
PURPOSE: A graphene oxide reducing agent and a method for manufacturing reduced graphene oxide based on the same are provided to improve electronic characteristic such as electronic conductivity and to lower the temperatures of manufacturing processes. CONSTITUTION: A graphene oxide reducing agent is the mixture of a halogen atom-containing reducing agent and trifluoro acetic acid. The halogen atom-containing reducing agent is selected from a group including HI, HCl, and HBr. A method for manufacturing reduced graphene oxide includes a reaction in which the graphene oxide reducing agent and graphene oxide at a temperature between -20 and 120 degrees Celsius.