Fabrication of Transparent and Conductive Graphene Film from Graphite by Using Non-Ionic Polymer Surfactant

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강민수; 조원호

Issue Date
2012 한국고분자학회 추계 정기총회 및 연구논문발표회, 2012. 10. 11 - 10. 12, 창원컨벤션센터
Graphene, a new material with 2-dimensional nanostructure consisting of a single layer of sp2
network of carbon atoms, has distinctive electronic properties such as room temperature
quantum effects, arnbipolar electric field effects, and high carrier mobility. It is, however,
difficult to fabricate graphene film from graphite via a solution process using organic solvent,
though it is a cheap and convenient way compared to the CVD method. In this study, we
report a new method to fabricate graphene film using a polymer surfactant to disperse
homogeneously graphene sheets in ethanol. The surfactant consists of oligothiophene, which
is strongly adsorbed onto the graphene surface, and polyethylene glycol, which interacts with
ethanol. Hence, the surfactant is expected to effectively disperse graphene sheets in ethanol.
Graphene film with a sheet resistance of 300 0/sq at 72% transmittance at 550 nrn was
fabricated by vacuum filtration. When the film quality and thickness of graphene sheets are
measured by Raman spectroscopy and transmission electron microscope, it reveals that our
films have better quality as compared to graphene films reported previously.
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Materials Science and Engineering (재료공학부)Others_재료공학부
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