Controlling Hydrogenation of Graphene on Ir(111)

Richard Balog, Mie Andersen, Bjarke Jørgensen, Zeljko Sljivancanin, Bjørk Hammer, Alessandro Baraldi, Rosanna Larciprete, Philip Hofmann, Liv Hornekær, Silvano Lizzit

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Abstract

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
Volume7
Issue5
Pages (from-to)3823–3832
Number of pages9
ISSN1936-0851
DOIs
Publication statusPublished - 13 Apr 2013

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