Impact of physisorbed species on transport properties of graphene

ORAL

Abstract

We have measured the impact of physisorbed species, including Argon, Krypton, Nitrogen, water and Benzene, on the transport properties of mechanically-exfoliated graphene sheets on SiO$_{2}$/Si in an ultra-high vacuum environment at temperatures near 30 K. We controlled the gas dosage down to the sub-monolayer level and found species-specific effects on the field-effect mobility of graphene. We observed the influence of different molecular sizes, molecular dipole moment, and intermolecular interactions. We will discuss our results in the context of recent theoretical calculations within the Boltzmann transport framework.

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Authors

  • Chaun Jang

    Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Jianhao Chen

    Dept. of Physics, University of Maryland, College Park, MD, University of Maryland, Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Shudong Xiao

    Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Masa Ishigami

    Department of Physics and Materials Research Science and Engineering Center, University of Maryland, College Park, MD 20742

  • Ellen Williams

    Department of Physics \& MRSEC, University of Maryland, College Park, Dept. of Physics, University of Maryland, College Park, MD, Dept. of Physics, University of Mayland, College Park,MD 20742-4111 USA, U. of Maryland, College Park, University of Maryland, University of Maryland, College Park, University of Maryland - College Park, Department of Physics and Materials Research Science and Engineering Center, University of Maryland, College Park, MD 20742

  • Michael Fuhrer

    University of Maryland, Dept. of Physics, University of Maryland, College Park, MD, Dept. of Physics, University of Mayland, College Park,MD 20742-4111 USA, Mater. Res. Sci. and Eng. Ctr., Ctr. for Nanophys. and Adv. Mater., and Dept. of Phys., Univ. of MD, College Park, MD 20742, Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742