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Controlling Hydrogenation of Graphene on Ir(111)

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  • Richard Balog
  • Mie Andersen
  • Bjarke Jørgensen, Denmark
  • Zeljko Sljivancanin, Vinca Institute of Nuclear Sciences, Beograd, Serbia
  • Bjørk Hammer
  • Alessandro Baraldi, University of Trieste and IOM-CNR Laboratorio TASC, Trieste, Italy
  • Rosanna Larciprete, CNR Istituto dei Sistemi Complessi, Rom, Italy
  • Philip Hofmann
  • Liv Hornekær
  • Silvano Lizzit, Elettra-Sincrotrone Trieste, Trieste, Italy
Combined fast X-ray photoelectron spectroscopy and density functional theory
calculations reveal the presence of two types of hydrogen adsorbate structures at the graphene/
Ir(111) interface, namely, graphane-like islands and hydrogen dimer structures. While the former
give rise to a periodic pattern, dimers tend to destroy the periodicity. Our data reveal distinctive
growth rates and stability of both types of structures, thereby allowing one to obtain well-defined
patterns of hydrogen clusters. The ability to control and manipulate the formation and size of
hydrogen structures on graphene facilitates tailoring of its properties for a wide range of
applications by means of covalent functionalization.
Original languageEnglish
JournalA C S Nano
Pages (from-to)3823–3832
Number of pages9
Publication statusPublished - 13 Apr 2013

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