Berlin 2015 – scientific programme

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DS: Fachverband Dünne Schichten

DS 39: Poster Session II

DS 39.10: Poster

Thursday, March 19, 2015, 16:00–18:30, Poster F

Strong Interaction of MnPc on Ni(111): Influence of Graphene Buffer Layer — •Johannes Uihlein¹, Heiko Peisert¹, Hilmar Adler¹, Mathias Glaser¹, Małgorzata Polek¹, Ruslan Ovsyannikov², Maximilian Bauer², and Thomas Chassé¹ — ¹Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Tübingen, Germany. — ²Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin, Germany.

The interactions at interfaces of transition metal phthalocyanines (TMPCs) on metal substrates strongly influence the charge transport across these interfaces, which may become important for possible future organic electronic and spintronic devices. Molecule-substrate interactions may influence the local charge and thus the spin state of the central metal atom within the first molecular layer. This will be especially important for metal atoms possessing an open shell structure. For CoPc and FePc it was shown that with insertion of a graphene buffer-layer these interactions can be modified, depending on the central metal atom.[1][2] In contrast to CoPc and FePc, MnPc suffers serious damage to its molecular structure on Ni(111) with impact on the electronic structure. The insertion of graphene prevents the chemical reaction and an interfacial charge transfer is observed.[3] The studies were carried out using X-ray absorption and photoemission spectroscopies.

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

[2] J. Uihlein et al., J. Phys. Chem. C 2014, 118, 10106.

[3] J. Uihlein et al., J. Phys. Chem. C 2014, accepted.