Interface Energy Coupling between β-tungsten Nanofilm and Few-layered Graphene.

ABSTRACT: We report the thermal conductance induced by few-layered graphene (G) sandwiched between β-phase tungsten (β-W) films of 15, 30 and 40 nm thickness. Our differential characterization is able to distinguish the thermal conductance of β-W film and β-W/G interface. The cross-plane thermal conductivity (k) of β-W films is determined at 1.69~2.41 Wm^-1K^-1 which is much smaller than that of α-phase tungsten (174 Wm^-1K^-1). This small value is consistent with the large electrical resistivity reported for β-W in literatures and in this work. The β-W/β-W and β-W/G interface thermal conductance (G _W/W and G _W/G ) are characterized and compared using multilayered β-W films with and without sandwiched graphene layers. The average G _W

SUBMITTER: Han M 

PROVIDER: S-EPMC5610176 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature