Fig. 2: Experimental determination of temperature map.
From: Spatially mapping thermal transport in graphene by an opto-thermal method
Spatially resolved mapping of laser-induced temperature rise of graphene. a Raman 2D-peak position obtained with Plaser = 0.25 mW at different hot plate temperatures T1 and T7. The dashed circle is a guide to the eye for the support edge. b Density plot of the temperature evolution of the 2D-peak frequency. Two spatial points (center and edge, see dots in c are highlighted to represent the method. The inset shows a histogram of dω2D/dT of the complete membrane. c Spatial distribution of change in Raman shift per temperature change dω2D/dT obtained from linear fits to the data shown in b). d Raman 2D-peak position obtained with Plaser = 4 mW at 297 K. e Temperature distribution obtained by combining the results from c, d.
