Dresden 2014 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 43: Poster II: Organic thin films; Atomic layer deposition, Thin film characterization: Structure analysis and composition (XRD, TEM, XPS, SIMS, RBS, ...)

DS 43.5: Poster

Donnerstag, 3. April 2014, 16:00–19:00, P1

FePc and CoPc on Ni(111) and graphene/Ni(111): Influence of the central metal atom — •Johannes Uihlein, Heiko Peisert, Hilmar Adler, Mathias Glaser, Małgorzata Polek, and Thomas Chassé — Institut für Physikalische und Theoretische Chemie, Auf der Morgenstelle 18, 72076 Tübingen, Germany

The interactions at interfaces between transition metal phthalocyanines (TMPCs) and metal substrates play an important role for charge transport across the interfaces, which may become important for possible future spintronic devices. Molecule-substrate interactions may influence the local charge and thus the spin state of the central metal atom within the first molecular adlayer. This will be especially important for metal atoms possessing an open shell structure. For cobalt phthalocyanine (CoPc) on Ni(111) it has recently been shown, that a graphene buffer layer preserves a charge transfer from the Ni substrate to the molecules metal atom, but changes the detailed electronic situation at the molecule substrate interface [1]. To reveal the effect of the central metal atom of the Pc on interactions at these interfaces we studied iron phthalocyanine on Ni(111) and graphene/Ni(111) using X-ray absorption and photoemission spectroscopies. The comparison to CoPc reveals significant differences.

[1] J. Uihlein et al., J. Chem. Phys. 2013, 138, 081101.