Bimodal Control of Heat Transport at Graphene-Metal Interfaces Using Disorder in Graphene.

ABSTRACT: Thermal energy transport across the interfaces of physically and chemically modified graphene with two metals, Al and Cu, was investigated by measuring thermal conductance using the time-domain thermoreflectance method. Graphene was processed using a He²⁺ ion-beam with a Gaussian distribution or by exposure to ultraviolet/O₃, which generates structural or chemical disorder, respectively. Hereby, we could monitor changes in the thermal conductance in response to varying degrees of disorder. We find that the measured conductance increases as the density of the physical disorder increases, but undergoes an abrupt modulation with increasing degrees of chemical modification, which decreases at first and then increases considerably. Moreover, we find that the conductance va

SUBMITTER: Kim J 

PROVIDER: S-EPMC5048174 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature