Abstract:
PURPOSE: A method for controlling graphene layers is provided to obtain a single layered or dual layered graphene in a uniform structure by eliminating non-uniform structure such as grains. CONSTITUTION: A method for controlling graphene layers includes the following: A graphene is formed on one side of a first substrate. A second substrate is formed on another side of the first substrate. Light is irradiated to the graphene in order to induce Fresnel interference. Multilayered or non-uniform graphene on the graphene is eliminated through the Fresnel interference. The light is laser light. The first substrate is an organic substrate or a metal oxide substrate.
Abstract:
PURPOSE: A method for removing a carbonization catalyst from a graphene sheet and a transfer method of the graphene sheet using the same are provided to restrict or prevent damages of the graphene sheet when the carbonization catalyst is removed from the graphene sheet. CONSTITUTION: A method for removing a carbonization catalyst from a graphene sheet includes a step for removing the carbonization catalyst by suing a salt solution used as an oxidizer to oxidize the carbonization catalyst. The salt solution is a neutral or a basic salt solution. The salt solution is FeCl3, KMnO4, KClO3, KMnO3, K2CrO4 or K2Cr2O7. The carbonization catalyst is Ni, Co, Fe, Pt, Au, Al, Cr, Cu, Mg, Mn, Mo, Rh, Si, Ta, Ti, W, U, V or Zr.
Abstract:
본 발명에서는 비올로겐 화합물을 이용하여 탄소나노튜브의 분산효과를 증대시킴과 동시에 금속성 탄소나노튜브와 반도체성 탄소나노튜브를 각각 비극성 용매층과 물층으로 분리하는 방법과 이에 이용되는 조성물이 개시된다. 본 발명에 따르면 비올로겐의 산화, 환원 반응에 따른 극성, 비극성 차이를 이용하여 탄소나노튜브의 분산 및 분리를 효과적으로 수행할 수 있다. 탄소나노튜브, 상 분리, 비올로겐(viologen)
Abstract:
A transparent electrode, and the indicating device and the solar battery adopting the same are provided to apply the graphene sheet to the transparent electrode containing the graphene sheet and to improve the electrical characteristic of the transparent electrode. The transparent electrode comprises the transparent substrate and the transparent conductive film. The transparent conductive film comprises the graphene sheet. The transparent electrode can be the flexible. The thickness of the graphene sheet can be 0.1nm to 100nm. The surface resistance of the transparent electrode can be 1Ф / sq. to 1000Ф / sq. The permeability of the transparent electrode can be 70% to 99.9%.
Abstract:
A doping method of a carbon nanotube is provided to improve conductivity, to maintain flexibility and to be usefully used for various indicating devices, a thin film transistor or a solar battery etc. A doping method of a carbon nanotube comprise steps of: forming an oxidizing agent solution including an oxidizer and an organic solvent; and doping-treating the carbon nanotube to the oxidizing agent solution. The doping treatment comprises a step of mixing and agitating powders of the carbon nanotube into the oxidizing agent solution.