Figure 5.

Illustration of optothermal Raman methods. (a) Schematic of the thermal conductivity measurement showing suspended MoS₂ flakes and excitation laser light. (b) Simulation of laser heating temperature rise. (c) Raman peak frequency shift as a function of temperature. (d) Experimental data for Raman shift as a function of laser power, which determines the local temperature rise in response to the dissipated power. Reprinted with permission from Ref. [47]. Copyright 2014, American Chemical Society.