Influence of Polymeric Residue on the Thermal Conductivity of Suspended Bi-Layer Graphene

ORAL

Abstract

The thermal conductivity (\textit{$\kappa $}) of two bi-layer graphene samples suspended between two micro-resistance thermometers was measured to be close to 600 W m$^{-1}$ K$^{-1}$ at room-temperature and exhibits a \textit{$\kappa $} $\propto \quad T^{1.5}$ behavior at temperature ($T)$ between 50 -- 125 K. The lower thermal conductivity than the basal plane values of graphite and the temperature dependence are attributed to scattering of phonons in the bi-layer graphene by a residual polymeric layer that was clearly observed by transmission electron microscopy.

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Authors

  • Michael Pettes

    Department of Mechanical Engineering, The University of Texas at Austin, Austin, Tx

  • Insun Jo

    Department of Physics, The University of Texas at Austin, Austin, Tx, The University of Texas at Austin

  • Yao Zhen

    Department of Physics, The University of Texas at Austin, Austin, Tx, The University of Texas at Austin

  • Li Shi

    Department of Mechanical Engineering, The University of Texas at Austin, Austin, Tx