Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 6: Organic/bio Molecules on Metal Surfaces I
O 6.2: Vortrag
Montag, 31. März 2014, 10:45–11:00, TRE Phy
Addressing the metal centers in multi-spin-center macromolecule on Au(111) — •Maciej Bazarnik1, Bernhard Bugenhagen2, Annika Frank2, Jens Brede1, Marc H. Prosenc2, and Roland Wiesedanger1 — 1Institute of Applied Physics, University of Hamburg, D-20355 Hamburg, Germany — 2Institute of Inorganic Chemistry, University of Hamburg, D-20146 University of Hamburg, Germany
The use of magnetic molecules opens a gateway to a flexible design of novel spintronic devices to store, manipulate, and read spin information at the nanoscale. Crucial is the precise knowledge of molecular properties at the interface towards an electrode. Progress in this field relies on resolving and understanding the physics at the relevant interfaces. In particular the role of individual molecular constituents and the impact of the atomic environment on molecular properties determine device relevant parameters, such as conductance and spin polarization.
Here, we applied scanning tunneling microscopy to address individual metallic centers of multi-spin-center macromolecules. The analysis focuses on different triplesalophene molecules which have been deposited in vacuo on a Au(111) substrate by either using thermal sublimation or electrospray deposition. The triplesalophene constitutes of three organic salene-like ligands and can be functionalized with various metal ions in order to modify, e.g. the molecular spin state, and/or termination groups to manage the molecule-molecule interactions. We will discuss the influence of terminal groups on the physicochemical properties of the molecules.