Carbon nanostructures have emerged as likely candidates for a wide range of applications, driving research into novel synthetic techniques to produce nanotubes, graphene and other carbon-based materials. Single sheets of pristine graphene have been isolated from bulk graphite in small amounts by micromechanical cleavage1, and larger amounts of chemically modified graphene sheets have been produced by a number of approaches2,3,4,5,6,7. Both of these techniques make use of highly oriented pyrolitic graphite as a starting material and involve labour-intensive preparations. Here, we report the direct chemical synthesis of carbon nanosheets in gram-scale quantities in a bottom-up approach based on the common laboratory reagents ethanol and sodium, which are reacted to give an intermediate solid that is then pyrolized, yielding a fused array of graphene sheets that are dispersed by mild sonication. The ability to produce bulk graphene samples from non-graphitic precursors with a scalable, low-cost approach should take us a step closer to real-world applications of graphene.
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Novoselov, K. S. et al. Electric field effect in atomically thin carbon films. Science 306, 666–669 (2004).
Li, X. et al. Highly conducting graphene sheets and Langmuir–Blodgett films. Nature Nanotech. 3, 538–542 (2008).
Hernandez, Y. et al. High-yield production of graphene by liquid-phase exfoliation of graphite. Nature Nanotech. 3, 563–568 (2008).
Li, X., Wang, X., Zhang, L., Lee, S. & Dai, H. Chemically derived, ultrasmooth graphene nanoribbon semiconductors. Science 319, 1229–1232 (2008).
Stankovich, S. et al. Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide. Carbon 45, 1558–1565 (2007).
Stankovich, S. et al. Graphene-based composite materials. Nature 442, 282–286 (2006).
Li, D., Müller, M. B., Gilje, S., Kaner, R. B. & Wallace, G. G. Processable aqueous dispersions of graphene nanosheets. Nature Nanotech. 3, 101–105 (2008).
Landau, L. D. Zur theorie der phasenumwandlungen II. Phys. Z. Sowjetunion 11, 26–35 (1937).
Meyer, J. C. et al. The structure of suspended graphene sheets. Nature 446, 60–63 (2007).
Dikin, D. A. et al. Preparation and characterization of graphene oxide paper. Nature 448, 457–460 (2007).
Krishnan, A. et al. Graphitic cones and the nucleation of curved carbon surfaces. Nature 388, 451–454 (1997).
Land, T. A., Michely, T., Behm, R. J., Hemminger, J. C. & Comsa, G. STM investigation of single layer graphite structures produced on Pt(111) by hydrocarbon decomposition. Surf. Sci. 264, 261–270 (1992).
Nagashima, A., Nuka, K., Itoh, H., Ichinokawa, T. & Oshima, C. Electronic states of monolayer graphite formed on TiC(111) surface. Surf. Sci. 291, 93–98 (1993).
Malesevic, A. et al. Synthesis of few-layer graphene via microwave plasma-enhanced chemical vapour deposition. Nanotechnology 19, 305604 (2008).
Dato, A., Radmilovic, V., Lee, Z., Phillips, J. & Frenklach, M. Substrate-free gas-phase synthesis of graphene sheets. Nano Lett. 8, 2012–2016 (2008).
Forbeaux, I., Themlin, J. M. & Debever, J. M. Heteroepitaxial graphite on 6H-SiC(0001): Interface formation through conduction-band electronic structure. Phys. Rev. B 58, 16396–16406 (1998).
van Bommel, A. J., Crombeen, J. E. & van Tooren, A. LEED and Auger electron observations of the SiC(0001) surface. Surf. Sci. 48, 463–472 (1975).
Kuang, Q. et al. Low temperature solvothermal synthesis of crumpled carbon nanosheets. Carbon 42, 1737–1741 (2004).
Shen, J.-M. & Feng, Y.-T. Formation of flower-like carbon nanosheet aggregations and their electrochemical application. J. Phys. Chem. C 112, 13114–13120 (2008).
Kawakami, M., Karato, T., Takenaka, T. & Yokoyama, S. Structure analysis of coke, wood charcoal and bamboo charcoal by Raman spectroscopy and their reaction rate with CO2 . ISIJ Int. 45, 1027–1034 (2005).
Coutinho, A. R., Rocha, J. D. & Luengo, C. A. Preparing and characterizing biocarbon electrodes. Fuel Process. Technol. 67, 93–102 (2000).
Deprez, N. & McLachlan, D. S. The analysis of the electrical conductivity of graphite powders during compaction. J. Phys. D: Appl. Phys. 21, 101–107 (1988).
Gregg, S. J. & Sing, K. S. W. Adsorption, Surface Area and Porosity (Academic Press, 1982).
Boehm, H. P., Clauss, A., Fisher, G. O. & Hofmann, U. Das adsorptionsverhalten sehr dünner kohlenstoff-folien. Z. Anorg. Allg. Chem. 316, 119–127 (1962).
This research was supported by the University of New South Wales (UNSW), the Faculty Research Grant Program (FRGP), Goldstar grants and an Australian Postgraduate Award (APA) to M.C. AFM measurements were carried out courtesy of P.T. at the University of Sydney.
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Choucair, M., Thordarson, P. & Stride, J. Gram-scale production of graphene based on solvothermal synthesis and sonication. Nature Nanotech 4, 30–33 (2009). https://doi.org/10.1038/nnano.2008.365
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