Transport properties of pristine and doped graphene

ORAL

Abstract

Graphene has attracted a lot of attention for various applications recently. Chemically exfoliated graphene is one of the best methods to prepare good quality and large amount of few-layer graphene sheets. We prepared pristine and doped graphene using chemical exfoliation through high energy tip sonication technique. The exfoliated graphene was later sintered for studying thermoelectric properties. The thermopower of these samples exhibits valleys, tentatively assigned to phonon drag, which shift towards higher temperature upon vacuum annealing and electron doping. Such a similar behavior was previously observed in doped carbon nanotubes. The effects of vaccum annealing and doping upon the fundamental behavior of thermoelectric power and thermal conduction of graphene will be presented.

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Authors

  • Pooja Puneet

    Department of Physics and Astronomy, Clemson University, Clemson SC 29634

  • Ramakrishna Podila

    Clemson University, Department of Physics and Astronomy, Clemson University, Department of Physics and Astronomy, Clemson University, Clemson SC 29634, Department of Physics, Clemson University

  • Luciana Oliveira

    Department of Materials Science and Engineering, Clemson University, Clemson SC 29634, Clemson University

  • Terry M. Tritt

    Department of Physics and Astronomy, Clemson University, Clemson SC 29634, Department of Physics and Astronomy, Clemson University, Clemson, South Carolina

  • Apparao Mohan Rao

    Department of Physics and Astronomy, Clemson University, Clemson SC 29634, Clemson University