Figure 1
(a) Temperature profiles along the radial direction with different outer radius (rout) at 300 K. The normalized radius, Rnormal, is defined in Eq. (2). (b) The thermal conductivity of graphene disk with different rout at 300 K. The symbols are numerical data and the lines are fitted lines. The fitted values of α are 1.38 ± 0.03, 1.47 ± 0.01, 1.55 ± 0.01, 1.66 ± 0.02 corresponding to rout as 8.22, 11.16, 13.89 and 25.24 nm, respectively. The error bar is a combination of the error in the calculation of temperature gradient and the standard error of heat flux. The inset is schematic picture of graphene disk structure. The inside atoms (shaded in red) and the outside atoms (shaded in blue) are controlled by heat baths with temperatures Tin and Tout, respectively.
