title: Transfer-free electrical insulation of epitaxial graphene from its metal substrate.
abstract: High-quality, large-area epitaxial graphene can be grown on metal surfaces, but its transport properties cannot be exploited because the electrical conduction is dominated by the substrate. Here we insulate epitaxial graphene on Ru(0001) by a stepwise intercalation of silicon and oxygen, and the eventual formation of a SiO(2) layer between the graphene and the metal. We follow the reaction steps by X-ray photoemission spectroscopy and demonstrate the electrical insulation using a nanoscale multipoint probe technique.
authors.affiliation: Sincrotrone Trieste, S.S. 14 Km 163.5, 34149 Trieste, Italy.
authors.forename: Silvano
authors.initials: S
authors.lastname: Lizzit
authors.forename: Rosanna
authors.initials: R
authors.lastname: Larciprete
authors.forename: Paolo
authors.initials: P
authors.lastname: Lacovig
authors.forename: Matteo
authors.initials: M
authors.lastname: Dalmiglio
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Orlando
authors.forename: Alessandro
authors.initials: A
authors.lastname: Baraldi
authors.forename: Lauge
authors.initials: L
authors.lastname: Gammelgaard
authors.forename: Lucas
authors.initials: L
authors.lastname: Barreto
authors.forename: Marco
authors.initials: M
authors.lastname: Bianchi
authors.forename: Edward
authors.initials: E
authors.lastname: Perkins
authors.forename: Philip
authors.initials: P
authors.lastname: Hofmann
mesh_terms: D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D006108:Graphite / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D008968:Molecular Conformation; D010316:Particle Size; D012413:Rubidium / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D012822:Silicon Dioxide; D006108:Graphite; D012413:Rubidium