Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 81: Oxide and Insulator Surfaces: Adsorption II
O 81.4: Vortrag
Mittwoch, 22. März 2017, 16:45–17:00, WIL C107
Adsorption of Organic Molecules on Magnetite Single Crystal Surfaces — •Marcus Creutzburg1,2, Heshmat Noei1, and Andreas Stierle1,2 — 1Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, Hamburg, Germany — 2Fachbereich Physik, Universität Hamburg, Jungiusstraße 9, Hamburg, Germany
Magnetite (Fe3O4) is a very important and diverse transition metal oxide with applications in catalysis, data storage and biomedical imaging. In a recent study magnetite nanoparticles linked by oleic acid molecules show exceptional isotropic mechanical properties [1]. To give further insight on how these nanoparticles interact with organic molecules it is crucial to study flat single crystal and vicinal Fe3O4 surfaces. In this contribution, we present initial results on the adsorption of water and organic molecules like formic acid and oleic acid on the magnetite (111) and on the vicinal (112) surface under UHV conditions obtained by vibrational spectroscopy and X-ray photoemission spectroscopy. We show low energy electron diffraction patterns of the vicinal (112) which allows us to conclude that this surface is indeed stable and presents regularly ordered terraces and steps.
[1] A. Dreyer et al., Nature Materials 15, 522-528 (2016)