Evolution of CuI/Graphene/Ni(111) System during Vacuum Annealing

Research output: Contribution to journalArticle

Abstract

We present a combined core-level spectroscopy and low-energy electron diffraction study of the evolution of thin CuI layers on graphene/Ni(111) during annealing. It has been found that the annealing of the CuI/graphene/Ni(111) system up to 160 degrees C results in the formation of an ordered CuI overlayer with a (root 3 x root 3) R30 degrees structure on top of the graphene surface. At annealing temperatures of about 180 degrees C or higher, the CuI overlayer decomposes with a simultaneous intercalation of Cu and I atoms underneath the graphene monolayer on Ni(111). Nearly complete intercalation of graphene by Cu and I atoms can be achieved by deposition of about 20 angstrom of CuI, followed by annealing at 200 degrees C. The intercalated graphene layer is p-doped due to interfacial iodine atoms.

Details

Authors
  • Alexander V. Generaloy
  • Konstantin Simonov
  • Nikolay A. Vinogradov
  • Elena M. Zagrebina
  • Nils Martensson
  • Alexei Preobrajenski
  • Alexander S. Vinogradoy
Organisations
External organisations
  • Uppsala University
  • Saint Petersburg State University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Chemistry
Original languageEnglish
Pages (from-to)12434-12444
JournalJournal of Physical Chemistry C
Volume119
Issue number22
StatePublished - 2015
Peer-reviewedYes