| 论文简介 |
Thermal transport of graphene occupies a unique place in thermal management of electronic
devices, especially for nanosize devices with high-density integration and high dissipated power.
The structure of graphene on nanometer scale changes its thermal conductance. Here, the thermal
characters of graphene have been researched by nonequilibrium molecular dynamics simulation
(NEMDS) at room temperature. Special attention is focused on the edge type (zigzag or armchair)
and nanostructure size dependence of conductivity for heat. The consequences suggest that the
thermal conductivity of zigzag edge has been higher than that of armchair, which is because of the
higher phonon group velocities. Furthermore, thermal conductivity shows a rising tendency, when
the model is calculated from length of 21.84 nm to 43.78 nm. The result indicates that the thermal
property performs a strong dependence on nanostructure size which is less than phonon mean free
path (775 nm). Our research highlights the significance of structure attribute relationships together
with providing useful guideline in calculations for nanosize devices thermal management. |
(创新港)
