Synthesis of Bilayer Graphene on 90/10 Copper (Cu)/Nickel (Ni) Alloy and Transfer by Electrochemical Delamination

Report No. ARL-TR-8144
Authors: Eugene Zakar; Robert Burke; Madan Dubey
Date/Pages: September 2017; 24 pages
Abstract: This study reports the growth of bilayer graphene on 90/10 copper/nickel alloy foils and thin films by chemical vapor deposition. We also describe an electrochemical delamination method that does not rely on etching of the underlying metal for release of the graphene layer. Instead, hydrogen bubble evolution is used to separate the graphene at the metal/graphene interface. The bubble delamination process overcomes difficulties associated with traditional wet etching of the metal, allowing major reductions in processing time and generation of hazardous chemical waste. Furthermore, since the metal catalyst is not consumed in the process, it can be recycled. The graphene can be transferred to a rigid or flexible substrate. We evaluate the quality of graphene transferred from a metal foil and metal film to a host silicon dioxide/silicon substrate by micro Raman and optical microscopy imaging methods.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2017