Cu oxidation kinetics through graphene and its effect on the electrical properties of graphene.

ABSTRACT: The oxidation kinetics of Cu through graphene were evaluated from the surface coverage of Cu oxide (F _ox) by varying the oxidation time (t _ox = 10-360 min) and temperature (T _ox = 180-240 °C) under an air environment. F _ox, as a function of time, well followed the Johnson-Mehl-Avrami-Kolmogorov equation; thus, the activation energy of Cu oxidation was estimated as 1.5 eV. Transmission electron microscopy studies revealed that Cu₂O formed on the top of the graphene at grain boundaries (G-GBs), indicating that Cu₂O growth was governed by the out-diffusion of Cu through G-GBs. Further, the effect of Cu oxidation on graphene quality was investigated by measuring the electrical properties of graphene a

SUBMITTER: Kim MS 

PROVIDER: S-EPMC9056939 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature