Thermal conductivity of mass-graded graphene flakes

TL;DR

This study uses molecular dynamics simulations to investigate thermal conduction in mass-graded graphene flakes, finding no thermal rectification effect and analyzing how heat flux and mass gradient influence thermal conductivity.

Contribution

It provides the first detailed analysis showing mass-graded graphene does not exhibit thermal rectification, expanding understanding of heat transport in nanomaterials.

Findings

No thermal rectification observed in mass-graded graphene

Thermal conductivity depends on heat flux and mass gradient

Mechanism for absence of rectification discussed

Abstract

In this letter we study thermal conduction in mass-graded graphene flakes by nonequilibrium molecular dynamics simulations. It is found that mass-graded graphene flakes reveal no thermal rectification effect in thermal conduction process. The dependence of thermal conductivity upon the heat flux and the mass gradient are studied to confirm the generality of the result.The mechanism leading to the absence of thermal rectification effect is also discussed.