Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 45: Organic-Inorganic Hybrid Systems and Organic Films
O 45.21: Poster
Dienstag, 21. März 2017, 18:30–20:30, P1A
Vibrational properties of organic thin films on graphene/Ru(0001) — •Sebastian Flade and Peter Jakob — Fachbereich Physik, Philipps-Universität Marburg, 35032 Marburg, Germany
Ultrathin films of fullerene (C60) and pentacene (PEN) have been prepared on graphene/Ru(0001) and their vibrational properties, as well as thermal evolution investigated by using Fourier-transform infrared spectroscopy. Monolayer species are found to display distinctly different vibrational signatures as compared to higher layers which indicates a weak chemical interaction. From the variation of relative intensities of vibrational modes structural changes within the organic films are derived. In particular, the thermal stability of grown layers, as well as their layered structure in case of C60 - PEN heterolayers on g/Ru(0001) has been monitored. Comparison to layers deposited directly on the Ru(0001) surface illustrates the effect of graphene acting as a passivation layer between the transition metal substrate and the molecular film.