Graphene has attracted a great deal of scientific and technological attention in recent years due to its unique electronic, mechanical and thermal properties ^1-3. A great promise has been shown for applications in different areas such as electronics, energy storage and conversion as well as in the development of biosensors ^4-7.

    Here, we demonstrate that graphene oxide can be reduced to graphene by adding azide-terminated dopamine. The reduced character of graphene was investigated using cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS). Next, “click” reaction has been performed using graphene modified with azide-terminated dopamine and alkyne-terminated ferrocene. The interaction between dopamine and graphene is based on π-stacking interactions between the hexagonal cells of graphene and the aromatic ring structure of dopamine ⁸. The success of the “click” reaction was confirmed  by XPS and CV as well as FTIR.

Fig. 1:Schematic illustration of the preparation of azido-dopamine capped grahene nanosheets.

References

1. K. S. Novoselov, A. K. Geim, S. V. Morozov, D. Jiang, Y. Zhang, S. V. Dubonos, I. V. Grigorieva, and A. A. Firsov, Science, 306, 666 (2004).

2. M. J. Allen, V. C. Tung, and R. B. Kaner, Chem. Rev., 110, 132 (2009).

3. Y. Shao, J. Wang, H. Wu, J. Liu, I. A. Aksay, and Y. Lin, Electroanalysis, 22, 1027 (2010).

4. L. X. Li, G. Y. Zhang, X. D. Bai, X. M. Sun, X. R. Wang, E. Wang, and H. J. Dai, Science, 319, 1229 (2008).

5. F. Schedin, A. K. Geim, S. V. Morozov, E. W. Hill, P. Blake, M. I. Katsnelson, and K. S. Novoselov, Nat. Mater., 6, 652 (2007).

6 . H.-X. Wang, K.-G. Zhou, Y.-L. Xie, J. Zeng, N.-N. Chai, J. Li, and H.-L. Zhang, Chem. Commun., 47, 5747 (2011).

7. S.-Y. Yang, K.-H. Chang, H.-W. Tien, Y.-F. Lee, S.-M. Li, Y.-S. Wang, J.-Y. Wang, C.-C. M. Ma, and C.-C. Hu, J. Mater. Chem., 21, 2374 (2011).

8. L. Q. Xu, W. J. Yang, K.-G. Neoh, E.-T. Kang, and G. D. Fu, Macromolecules, 43, 8336 (2010).

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