Nanoscale Graphene Disk: A Natural Functionally Graded Material --The Thermal Conductivity of Nanoscale Graphene Disk by Molecular Dynamics Simulation

摘要

In this letter, we investigate numerically (by non-equilibrium moleculardynamics) and analytically the thermal conductivity of nanoscale graphene disks(NGDs), and discussed the possibility to realize FGM with only one material,NGDs. We found that the NGD has a graded thermal conductivity and can be usedas FGM in a large temperature range. Moreover, we show the dependent of NGDs'thermal conductivity on radius and temperature. Our study may inspireexperimentalists to develop NGD based FGMs and help heat removal of hot spotson chips by graphene.