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Temperature-Dependent Raman Studies and Thermal Conductivity of Few-Layer MoS2

The Journal of Physical Chemistry C · 2013 · Vol. 117(17) · pp. 9042–9047

Satyaprakash Sahoo✉(University of Puerto Rico System)Anand P. S. Gaur(University of Puerto Rico System)Majid Ahmadi(University of Puerto Rico System)Maxime J.-F. Guinel(University of Puerto Rico System)Ram S. Katiyar(University of Puerto Rico System)

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Abstract

We report on the temperature dependence of in-plane E2g and out-of-plane A1g Raman modes in high-quality few-layer MoS2 (FLMS) prepared using a high-temperature vapor-phase method. The materials obtained were investigated using transmission electron microscopy. The frequencies of these two phonon modes were found to vary linearly with temperature. The first-order temperature coefficients for E12g and A1g modes were found to be (1.32 and 1.23) × 10–2 cm–1/K, respectively. The thermal conductivity of the suspended FLMS at room temperature was estimated to be ∼52 W/mK.

2D Materials and Applications Thermal properties of materials Thermography and Photoacoustic TechniquesThermal conductivityRaman spectroscopyPhononThermal conductivity measurementThermalConductivityTemperature measurementAnalytical Chemistry (journal)

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