Regensburg 2025 – scientific programme

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DS: Fachverband Dünne Schichten

DS 15: Organic Thin Films, Organic-Inorganic Interfaces

DS 15.1: Invited Talk

Friday, March 21, 2025, 09:30–10:00, H3

Structure formation and growth at the metal-organic interface — •Peter Zeppenfeld — Institute of Experimental Physics, Johannes Kepler University Linz, Austria

The evolution of the structural, electronic and optical properties of organic thin films strongly depend on the ordering, aggregation and orientation of the molecules within the very first or a few deposited monolayers. The chosen substrate and its intentional modification (e.g. by pre-adsorption of inorganic or organic species) may thus have a strong influence on the structural, electronic and optical properties of the growing organic thin film. Using complementary experimental methods, namely, surface optical spectroscopy (RDS, DRS), diffraction (LEED) and microscopy (STM, PEEM), supported by empirical models and ab-initio calculations we aim to identify (and eventually quantify) the underlying driving forces. We will present examples on the 2D condensation of organic molecules on metal surfaces, the structural and orientational ordering in 2D (and quasi 1D) monolayer phases and its influence on the further growth of the organic thin film. Finally, we will illustrate the effects of modification / templating of the substrate on the structure and properties of the organic layers.

Keywords: Organic thin films; Metal substrate; Structure; Growth; Optical Spectroscopy