▎ 摘　　要

NOVELTY - Preparation of nickel-copper twin-crystal film with 60 degrees in-plane angle involves depositing a metal film on a crystal surface of an aluminum oxide of the sapphire substrate, obtaining front body nickel copper film adhered on sapphire substrate, placing the front body nickel-copper film is placed in heating furnace, performing annealing treatment in a mixed atmosphere of argon gas and hydrogen to obtain nickel-copper twin-crystal film with preferred orientation in out-of-plane direction. USE - Preparation of nickel-copper twin-crystal film (claimed). ADVANTAGE - The nickel-copper twin-crystal film has strong catalytic performance, greatly improved growth speed of the graphene and reduced cost of preparing graphene single crystal wafer.