Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 19: Poster Monday: Organic Molecules on Inorganic Surfaces
O 19.5: Poster
Montag, 1. April 2019, 17:45–20:00, Poster F
Heteromolecular interfaces on metals in the physisorptive regime — •Qi Wang1, Antoni Franco-Canellas1, Jiacheng Yang2, Samuel Struzek1, Mengting Chen2, Steffen Duhm2, Alexander Gerlach1, and Frank Schreiber1 — 1Institut für Angewandte Physik, Universität Tübingen, Tübingen, Germany — 2Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, China
Bilayers of pi-conjugated organic molecules, being considered as model systems for more complex thin film architectures, have been used to investigate the templating effect on metals. Because molecular exchange can hamper the controlled preparation of heteromolecular structures [1], a detailed characterization of different molecule-substrate combinations is required. We found that the organic-metal interaction strength is the decisive factor for the favorable sequential arrangement in organic heterostructures and molecular exchange is possible to occur for weakly interacting template layers [1]. To investigate the molecular arrangement in a physisorptive regime, we have studied the vertical arrangement and the chemical fingerprints of two bilayer systems deposited on Au(111) surfaces [2]. The adsorption properties of organic systems were investigated by X-ray standing waves (XSW), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS).
[1] Q. Wang, et.al. J. Phys. Chem, C. 2018, 122, 9480-9490.
[2] A. Franco-Canellas, et.al. Phys. Rev. Mater. 2017, 1, 013001.