Y. Taniguchi, T. Miki, Takanori Mitsuno, Y. Ohno, M. Nagase, K. Minagawa, M. Yasuzawa
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Hydrophilic graphene film by molecular functionalization
Hydrophilic graphene film by molecular functionalization was investigated. In order to realize the hydrophilic graphene film without introducing defects, the pyrene derivative with a phosphorylcholine group was synthesized. Functionalization time dependences on contact angle and 4-terminal resistivity were measured using SiC epitaxial graphene. Contact angle was almost constant (76°) at first, and then, suddenly decreased (59°) at 3 min. On the other hand, resistivity was gradually increased (0.6 to 2.4 μΩm), and saturated after 5 min, indicates that this functionalization process does not break the graphene structure. These results indicate that hydrophilic graphene film was successfully fabricated by molecular functionalization.
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