title: Large single crystals of graphene on melted copper using chemical vapor deposition.
abstract: A simple method is presented for synthesizing large single crystal graphene domains on melted copper using atmospheric pressure chemical vapor deposition (CVD). This is achieved by performing the reaction above the melting point of copper (1090 °C) and using a molybdenum or tungsten support to prevent balling of the copper from dewetting. By controlling the amount of hydrogen during growth, individual single crystal domains of monolayer graphene greater than 200 μm are produced within a continuous film. Stopping growth before a complete film is formed reveals individual hexagonal domains of graphene that are epitaxially aligned in their orientation. Angular resolved photoemission spectroscopy is used to show that the graphene grown on copper exhibits a linear dispersion relationship and no sign of doping. HRTEM and electron diffraction reveal a uniform high quality crystalline atomic structure of monolayer graphene.
authors.affiliation: Department of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH, United Kingdom.
authors.forename: Yimin A
authors.initials: YA
authors.lastname: Wu
authors.forename: Ye
authors.initials: Y
authors.lastname: Fan
authors.forename: Susannah
authors.initials: S
authors.lastname: Speller
authors.forename: Graham L
authors.initials: GL
authors.lastname: Creeth
authors.forename: Jerzy T
authors.initials: JT
authors.lastname: Sadowski
authors.forename: Kuang
authors.initials: K
authors.lastname: He
authors.forename: Alex W
authors.initials: AW
authors.lastname: Robertson
authors.forename: Christopher S
authors.initials: CS
authors.lastname: Allen
authors.forename: Jamie H
authors.initials: JH
authors.lastname: Warner
mesh_terms: D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D003460:Crystallization / Q000379:methods; D005740:Gases / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006358:Hot Temperature; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D005740:Gases; D046911:Macromolecular Substances; D006108:Graphite; D003300:Copper