title: Oxidation resistance of graphene-coated Cu and Cu/Ni alloy.
abstract: The ability to protect refined metals from reactive environments is vital to many industrial and academic applications. Current solutions, however, typically introduce several negative effects, including increased thickness and changes in the metal physical properties. In this paper, we demonstrate for the first time the ability of graphene films grown by chemical vapor deposition to protect the surface of the metallic growth substrates of Cu and Cu/Ni alloy from air oxidation. In particular, graphene prevents the formation of any oxide on the protected metal surfaces, thus allowing pure metal surfaces only one atom away from reactive environments. SEM, Raman spectroscopy, and XPS studies show that the metal surface is well protected from oxidation even after heating at 200 °C in air for up to 4 h. Our work further shows that graphene provides effective resistance against hydrogen peroxide. This protection method offers significant advantages and can be used on any metal that catalyzes graphene growth.
authors.affiliation: Department of Mechanical Engineering and Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, USA.
authors.forename: Shanshan
authors.initials: S
authors.lastname: Chen
authors.forename: Lola
authors.initials: L
authors.lastname: Brown
authors.forename: Mark
authors.initials: M
authors.lastname: Levendorf
authors.forename: Weiwei
authors.initials: W
authors.lastname: Cai
authors.forename: Sang-Yong
authors.initials: SY
authors.lastname: Ju
authors.forename: Jonathan
authors.initials: J
authors.lastname: Edgeworth
authors.forename: Xuesong
authors.initials: X
authors.lastname: Li
authors.forename: Carl W
authors.initials: CW
authors.lastname: Magnuson
authors.forename: Aruna
authors.initials: A
authors.lastname: Velamakanni
authors.forename: Richard D
authors.initials: RD
authors.lastname: Piner
authors.forename: Junyong
authors.initials: J
authors.lastname: Kang
authors.forename: Jiwoong
authors.initials: J
authors.lastname: Park
authors.forename: Rodney S
authors.initials: RS
authors.lastname: Ruoff
mesh_terms: D000497:Alloys / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D004553:Electric Conductivity; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D013696:Temperature; D014835:Volatilization
chemical_list: D000497:Alloys; D002244:Carbon; D006108:Graphite; D003300:Copper; D009532:Nickel; D006861:Hydrogen Peroxide