SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 64: Poster: Graphene

O 64.5: Poster

Mittwoch, 29. März 2023, 18:00–20:00, P2/EG

Organic Molecules on Graphene grown on a Pt(111) surface — •Shilpa Panchami Raj, Christophe Nacci, and Leonhard Grill — University of Graz

Graphene, a flat monolayer of carbon atoms with two-dimensional honeycomb lattice, exhibits unique properties. If grown on a Pt(111) surface, only weak interaction is found between the substrate and the graphene sheet. This renders it an interesting system to decouple organic molecules on the graphene layer from the metal underneath as they might preserve their electronic structure In this work, we present a scanning tunneling microscopy (STM) study under ultrahigh vacuum (UHV) with the deposition of different organic molecules on graphene that was epitaxially grown on a Pt(111) substrate. Experiments were done at cryogenic temperatures of 5 K, which allows to image single molecules in a stable fashion and also to manipulate them with the tip of the STM in a controlled way. Adsorption properties of the molecules are studied in view of the characteristic Moiré pattern of the graphene/Pt(111) system. Moreover, first attempts will be presented how chemical reactions can be induced on this system.