Chemical-Vapor-Deposited Graphene as a Thermally Conducting Coating.

ABSTRACT: We performed scanning thermal microscopy measurements on single layers of chemical-vapor-deposited (CVD) graphene supported by different substrates, namely, SiO₂, Al₂O₃, and PET using a double-scan technique to remove the contribution to the heat flux through the air and the cantilever. Then, by adopting a simple lumped-elements model, we developed a new method that allows determining, through a multistep numerical analysis, the equivalent thermal properties of thermally conductive coatings of nanometric thickness. In this specific case we found that our CVD graphene is "thermally equivalent", for heat injection perpendicular to the graphene planes, to a coating material of conductivity k _eff = 2.5 ± 0.3 W/m K and thickness t _e

SUBMITTER: Tortello M 

PROVIDER: S-EPMC6541428 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature