Regensburg 2016 – scientific programme

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O: Fachverband Oberflächenphysik

O 45: Graphene: Adsorption, Intercalation and Doping

O 45.7: Poster

Tuesday, March 8, 2016, 18:15–20:30, Poster E

Adsorption of molecules on graphene-supported iridium clusters — •Andreas Stoll, Kira Jochmann, and Thorsten Bernhardt — Universität Ulm

The adsorption of organosulfur and porphyrin molecules onto numerous metal and semiconductor substrates results in the formation of dense highly oriented self-assembled monolayer structures. Hitherto, the majority of studies dealt with the adsorption of these molecules on the Au(111) surface or on gold clusters in solution. In this contribution we investigate the adsorption of various organosulfur and prophyrin molecules on iridium clusters that were prepared on the moiré-type superstructure of graphene on Ir(111) by a combination of two photon photoemission spectroscopy and scanning tunneling microscopy (STM). The selection of this system was guided by the prospect to directly map the single chemisorbed molecules via room temperature STM. All molecules were found to exhibit unique geometric adsorption patterns on the bare Ir(111) surface, on graphene, and on the Ir clusters on graphene, respectively.