Alternative wet transfer of graphene to copper substrate
Studies on graphene on metals may provide better understanding for its use on device applications and electrical measurements. While graphene on metals are usually produced by chemical vapor deposition (CVD) growth process, the process itself induces corrugations to the underlying substrate which affect its transport properties. With this, we propose a wet transfer method to transfer graphene to metal substrates in particular copper. Using the standard process with deionized water, oxidation of substrate occurs to which we address by using a different molecule that doesn't readily react with metal. Raman studies confirmed the adhesion of graphene to the substrate while atomic force microscopy was used to examine the surface morphology of the substrate. The transfer process presented here could provide better preparation of graphene on copper for electronic measurements.