Characterization of a Bar-coated Graphene film from Surfactant-added Water Dispersion

초록

Thin films of a chemically exfoliated graphene dispersion in water (GDW) were fabricated using a bar-coating method, and their surface morphology, electronic structure, and electrical properties were investigated. The GDW was mixed with a Triton X-100 (2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethanol, TX) surfactant to control viscosity and surface tension. Through this, graphene could be uniformly deposited on a polyethylene terephthalate substrate. In addition, the electronic structure of the graphene film was significantly different from that of pure graphene due to the oxidation of graphene and the presence of residual functional groups and TX. This difference in material properties causes the differences in the values of the sheet resistances. These results provide fundamental information that will lead to various applications of GDW. © 2021 The Korean Physical Society. All rights reserved.

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