| 초록 |
Graphene, a new material with two-dimensional nanostructure consisting of a single layer of sp2 network of carbon atoms, has demonstrated unique properties, such as low resistivity, high chemical stability, and excellent mechanical strength. However, it is difficult to fabricate graphene film through a solution process using organic solvent, and thus critically limits practical applications. In this study, we report a new method to fabricate graphene film using a new polymer surfactant to disperse homogeneously graphene sheets in ethanol. The polymer surfactant consists of oligothiophene, which is strongly adsorbed onto the graphene surface, and polyethylene glycol, which interacts with ethanol. Graphene films of 2 inches diameter were prepared by vacuum filtration. The solubility and electrical resistivity of graphene films were measured by 4-probe point and UV-vis spectroscopy, respectively. |
