Transfer-Free Electrical Insulation of Epitaxial Graphene from its Metal Substrate

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Silvano Lizzit
  • ,
  • Rosanna Larciprete
  • ,
  • Paolo Lacovig
  • ,
  • Matteo Dalmiglio
  • ,
  • Fabrizio Orlando
  • ,
  • Alessandro Baraldi
  • ,
  • Lauge Gammelgaard
  • ,
  • Lucas Barreto
  • ,
  • Marco Bianchi
  • Edward Perkins, Denmark
  • Philip Hofmann
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 SiO2 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.
Original languageEnglish
JournalNano Letters
Pages (from-to)4503−4507
Publication statusPublished - 2012

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