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.

*This work was supported by the U.S. Department of Energy award DE-FG02-07ER46377 and the National Science Foundation Graduate Research Fellowship Program (M.T.P.).

–

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