title: Controlling hydrogenation of graphene on Ir(111).
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.
authors.affiliation: Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark. balog@phys.au.dk
authors.forename: Richard
authors.initials: R
authors.lastname: Balog
authors.forename: Mie
authors.initials: M
authors.lastname: Andersen
authors.forename: Bjarke
authors.initials: B
authors.lastname: Jørgensen
authors.forename: Zeljko
authors.initials: Z
authors.lastname: Sljivancanin
authors.forename: Bjørk
authors.initials: B
authors.lastname: Hammer
authors.forename: Alessandro
authors.initials: A
authors.lastname: Baraldi
authors.forename: Rosanna
authors.initials: R
authors.lastname: Larciprete
authors.forename: Philip
authors.initials: P
authors.lastname: Hofmann
authors.forename: Liv
authors.initials: L
authors.lastname: Hornekær
authors.forename: Silvano
authors.initials: S
authors.lastname: Lizzit