Thermal conductivity of suspended pristine graphene measured by Raman spectroscopy

Details Thermal conductivity of suspended pristine graphene measured by Raman spectroscopy Thermal conductivity of suspended pristine graphene measured by Raman spectroscopy

2011-03-17

arxiv.org/abs/1103.3337v1

Physical Review B 83, 081419(R) (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4pages, 3 figures

Scientific paper

10.1103/PhysRevB.83.081419

The thermal conductivity of suspended single-layer graphene was measured as a function of temperature using Raman scattering spectroscopy on clean samples prepared directly on a prepatterned substrate by mechanical exfoliation without chemical treatments. The temperature at the laser spot was monitored by the frequency of the Raman 2$D$ band of the Raman scattering spectrum, and the thermal conductivity was deduced by analyzing heat diffusion equations assuming that the substrate is a heat sink at ambient temperature. The obtained thermal conductivity values range from $\sim$1800 Wm$^{-1}$K$^{-1}$ near 325 K to $\sim$710 Wm$^{-1}$K$^{-1}$ at 500 K.

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