Controlling Hydrogenation of Graphene on Ir(111)
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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.
Keywords:graphene / Ir(111) / hydrogen / XPS / DFT
Source:ACS Nano, 2013, 7, 5, 3823-3832
- HPAH - Hydrogen interaction with polycyclic aromatic hydrocarbons – from interstellar catalysis to hydrogen storage (EU-208344)
- Danish Council for Independent Research, Natural Sciences, Danish Council for Independent Research, Technology and Production Sciences, Lundbeck Foundation, MIUR, COST Action [MP0901]