Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory
O 36.33: Poster
Dienstag, 1. April 2014, 18:30–22:00, P1
Electrospray deposition of Mn12 and Fe4 single molecule magnets — •Philipp Erler1, Eva-Sophie Wilhelm1, Nicole Barth1, Samuel Bouvron1, Peter Schmitt2, Stefan Ambrus2, Ulrich Groth2, Luca Gragnaniello1, and Mikhail Fonin1 — 1Fachbereich Physik, Universität Konstanz — 2Fachbereich Chemie, Universität Konstanz
Single molecule magnets (SMMs) have attracted significant interest during the past decades due to their unique magnetic properties like hysteresis of purely molecular origin and the possibility to observe quantum tunneling of magnetization. This material class allows for basic studies on quantum effects of magnetism at the molecular scale and is furthermore a promising candidate for preliminary studies aiming at ultrahigh density data storage devices or quantum computing applications. However, progress in this field is hindered by the difficulty of depositing intact SMMs on surfaces.
We have implemented electrospray ionization for the deposition of Mn12-acetate SMMs on various substrates under ultra high vacuum conditions. The magnetic properties of thin films of Mn12-acetate were investigated with SQUID magnetometry, whereas the structural and electronic properties of sub-monolayers and individual molecules were studied by means of low temperature scanning tunneling microscopy and spectroscopy (STM/STS) and X-ray photoelectron spectroscopy (XPS). Furthermore, first attempts have been made for the electrospray deposition of Fe4 SMMs, which offer the advantage of an enhanced redox stability of the magnetic core.