Graphene is needed 1.
Graphene synthesis by cvd on copper substrates.
One alternative method that has been researched involves the creation of cvd graphene on a copper cu substrate in this example cu is used as a catalyst in the reaction.
Since in our experimental conditions graphene was synthesized over the whole substrate surface including areas covered by copper fingers one may expect that the large area graphene film on dielectric can be obtained by removing copper fingers by a simple wet etching process.
I feel that is the reason you are doing a.
However your target is to prepare the cu substrate for graphene synthesis so in this case small amount of oxygenated functional groups are beneficial.
Our research focused on synthesis of monolayer graphene on 25 µm thick copper cu substrates which allowed for lateral growth on the scale of many centimeters.
The graphene was grown using chemical vapor deposition cvd.
A creative approach to the cvd synthesis of ultra large area graphene based on selective joule heating was reported by kobayashi et al.
During cvd a reaction occurs between the copper substrate and the graphene that create a high level of hydrostatic compression coupling the graphene to the substrate.