Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 63: Poster DS (joint session DS/MM/O)

O 63.29: Poster

Mittwoch, 20. März 2024, 17:00–19:00, Poster B

Understanding the disparate interactions of thin polymer films with natively oxidized metal surfaces and metal oxide crystals — •Friedrich Bürger, Philipp Moritz, Lienhard Wegewitz, and Wolfgang Maus-Friedrichs — Clausthal Centre of Material Technology, Clausthal University of Technology, Agricolastr. 2, 38678 Clausthal-Zellerfeld

In the Collaborative Research Centre 1368 “oxygen free production” the molecular interactions between thin films of commonly used polymers, poly(ethyl cyanoacrylate) (PECA) and poly(methyl methacrylate) (PMMA), and different metal oxides have been characterized. In the context of this project, certain interactions became apparent, e. g. hydrogen bonding or ionic interactions that were observed on natively oxidized samples representing very thin oxide films. In contrast, these interactions were absent on a TiO2 single crystal. To investigate if this effect is reproducible and inherent to metal oxide single crystals, the interactions of PECA and different metal oxide single crystals are determined using X-Ray Photoelectron Spectroscopy (XPS), Ultraviolet Photoelectron Spectroscopy (UPS) and Metastable Induced Electron Spectroscopy (MIES). These results are compared to the interactions of natively oxidized metal samples with thin polymer films. Assuming reproducibility, a root cause for the disparate interactions is proposed.

Keywords: poly(ethyl cyanoacrylate); X-Ray Photoelectron Spectroscopy (XPS); Ultraviolet Photoelectron Spectroscopy (UPS); Metastable Induced Electron Spectroscopy (MIES)