Fabrication of flexible conductive graphene thin films based on high water-soluble sulfonated-triazine non-covalent functionalized graphene

Yu Liu; Shanyi Guang; Xinyan Su; Hongyao Xu

doi:10.1117/12.2053954

16 December 2013 Fabrication of flexible conductive graphene thin films based on high water-soluble sulfonated-triazine non-covalent functionalized graphene

Yu Liu, Shanyi Guang, Xinyan Su, Hongyao Xu

Author Affiliations +

Proceedings Volume 9068, Eighth International Conference on Thin Film Physics and Applications; 906819 (2013) https://doi.org/10.1117/12.2053954
Event: Eighth International Conference on Thin Film Physics and Applications (TFPA13), 2013, Shanghai, China

Abstract

We report a facile and scalable fabrication of flexible conductive graphene thin films via a vacuum filtration method based on high water-soluble sulfonated-triazine non-covalent functionalized graphene colloid (STGNS). A novel sulfonated triazine (ST) molecule was synthesized using a one-step method to improve the dispersion stability of graphene during the chemical reduction. AFM image of STGNS sheets showed the STGNS is individual dispersion of graphene sheets in water. FTIR, and UV-vis revealed ST molecules were successfully loaded onto graphene sheets by hydrogen bonding anchoring and π–π stacking. It was found that the dark homogeneous suspension of the STGNS with concentration up to 4.5 mg mL^-1 can remain stable with no visible precipitate for more than 6 months. The high watersoluble individually dispersed graphene colloid facilitated large-scale fabrication of flexible conductive graphene films with different thickness by adjusting the content of STGNS. The obtained graphene films exhibited a sheet resistance as low as ca. 5.6 KΩ^-1 with 78% transparency at 550 nm.

Citation Download Citation

Yu Liu, Shanyi Guang, Xinyan Su, and Hongyao Xu "Fabrication of flexible conductive graphene thin films based on high water-soluble sulfonated-triazine non-covalent functionalized graphene", Proc. SPIE 9068, Eighth International Conference on Thin Film Physics and Applications, 906819 (16 December 2013); https://doi.org/10.1117/12.2053954

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