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Graphene/metal oxide composite electrode materials for energy storage

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      Electric Field Effect in Atomically Thin Carbon Films

      We report a naturally-occurring two-dimensional material (graphene that can be viewed as a gigantic flat fullerene molecule, describe its electronic properties and demonstrate all-metallic field-effect transistor, which uniquely exhibits ballistic transport at submicron distances even at room temperature.
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        Two-Dimensional Gas of Massless Dirac Fermions in Graphene

        Electronic properties of materials are commonly described by quasiparticles that behave as non-relativistic electrons with a finite mass and obey the Schroedinger equation. Here we report a condensed matter system where electron transport is essentially governed by the Dirac equation and charge carriers mimic relativistic particles with zero mass and an effective "speed of light" c* ~10^6m/s. Our studies of graphene - a single atomic layer of carbon - have revealed a variety of unusual phenomena characteristic of two-dimensional (2D) Dirac fermions. In particular, we have observed that a) the integer quantum Hall effect in graphene is anomalous in that it occurs at half-integer filling factors; b) graphene's conductivity never falls below a minimum value corresponding to the conductance quantum e^2/h, even when carrier concentrations tend to zero; c) the cyclotron mass m of massless carriers with energy E in graphene is described by equation E =mc*^2; and d) Shubnikov-de Haas oscillations in graphene exhibit a phase shift of pi due to Berry's phase.
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          Preparation of Graphitic Oxide

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            Author and article information

            Journal
            Nano Energy
            Nano Energy
            Elsevier BV
            22112855
            January 2012
            January 2012
            : 1
            : 1
            : 107-131
            10.1016/j.nanoen.2011.11.001
            © 2012

            http://www.elsevier.com/tdm/userlicense/1.0/

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