Thermal Conductivity Measurement of Suspended Graphene Nanoribbons of 40nm Width

Abstract

The graphene nanoribbon (GNR) with a width of 100 nm or less is expected to be applied in semiconductor devices, but measurements of thermophysical properties of suspended GNRs have not yet been realized. In this study, we use the electrical self-heating method to measure the thermal conductivity of suspended GNRs that are directly synthesized by plasma-CVD. The thermal conductivity of suspended 40nm wide GNRs was measured to be less than 1/10 of that of large sized graphene.