Moving Beyond Scotch Tape: Scalable Transfer of Research-Grade CVD Graphene.

Abstract

While scalable graphene synthesis by chemical vapor deposition (CVD) has been in widespread use since 2008, fundamental research requiring consistently high quality continues to rely upon exfoliated graphene. Here we use evaporated Ni to transfer ultrahigh-quality CVD graphene from Cu(111) as continuous films or arrays of predefined shapes. By careful control over the evaporation conditions, we avoid damage to the graphene, preserving intrinsic quality. The dry transfer process minimizes strain and doping. After hBN encapsulation, the CVD-grown graphene shows low-temperature magnetotransport behavior on par with the best exfoliated graphene devices. The CVD-grown graphene can be stacked to create magic-angle twisted bilayer graphene with low twist disorder. These results demonstrate that CVD-grown graphene can replace exfoliated flakes for even the most demanding applications.