Control of Graphene's Properties by Reversible Hydrogenation: Evidence for Graphane

American Association for the Advancement of Science (AAAS) - Tập 323 Số 5914 - Trang 610-613 - 2009
D. C. Elias1,2,3,4,5, Rahul R. Nair1,2,3,4,5, Tariq Mohiuddin1,2,3,4,5, С. В. Морозов1,2,3,4,5, Peter Blake1,2,3,4, Matthew P. Halsall1,2,3,4,5, Andrea C. Ferrari1,2,3,4, Danil W. Boukhvalov1,2,3,4, M. I. Katsnelson1,2,3,4, A. K. Geǐm1,2,3,4,5, Kostya S. Novoselov1,2,3,4,5
1Department of Engineering, Cambridge University, 9 JJ Thomson Avenue, Cambridge CB3 OFA, UK.
2Institute for Microelectronics Technology, 142432 Chernogolovka, Russia
3Institute for Molecules and Materials, Radboud University Nijmegen, 6525 ED Nijmegen, Netherlands.
4Manchester Centre for Mesoscience and Nanotechnology, University of Manchester, M13 9PL, Manchester, UK.
5School of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK

Tóm tắt

Although graphite is known as one of the most chemically inert materials, we have found that graphene, a single atomic plane of graphite, can react with atomic hydrogen, which transforms this highly conductive zero-overlap semimetal into an insulator. Transmission electron microscopy reveals that the obtained graphene derivative (graphane) is crystalline and retains the hexagonal lattice, but its period becomes markedly shorter than that of graphene. The reaction with hydrogen is reversible, so that the original metallic state, the lattice spacing, and even the quantum Hall effect can be restored by annealing. Our work illustrates the concept of graphene as a robust atomic-scale scaffold on the basis of which new two-dimensional crystals with designed electronic and other properties can be created by attaching other atoms and molecules.

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This work was supported by Engineering and Physical Sciences Research Council (UK) the Royal Society the European Research Council (programs “Ideas” and “New and Emerging Science and Technology ” project “Structural Information of Biological Molecules at Atomic Resolution”) Office of Naval Research and Air Force Research Office of Scientific Research. D.C.E. acknowledges financial support from the National Council for Scientific and Technological Development (Brazil). The authors are grateful to Nacional de Grafite for providing high-quality crystals of natural graphite.

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American Association for the Advancement of Science (AAAS)

Tập 323 Số 5914

610-613

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