Berlin 2008 – scientific programme

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SYSA: Symposium Tayloring Organic Interfaces: Molecular Structures and Applications

SYSA 5: Poster Session SYSA

SYSA 5.81: Poster

Tuesday, February 26, 2008, 14:30–20:00, Poster A

Ordering and morphology of CoPc (FePc) thin films grown on Au(001)-5x20 — •Olga V. Molodtsova¹, Victor Yu. Aristov^1,2, and Martin Knupfer¹ — ¹IFW Dresden, Dresden, Germany — ²ISSP RAS, Chernogolovka, Russia

The molecular orientation and ordering in the organic semiconductor cobalt- and iron-phtalocyanine (CoPc and FePc) thin films in situ grown on a Au(001)-5x20 surface has been studied by a combination of Low Energy Electron Diffraction (LEED) and near-edge x-ray absorption spectroscopy. The results indicate that the molecular planes of CoPc and FePc (up to 60 Å) deposited at substrate temperatures ranging from room temperature (RT) to 300°C are mainly laying parallel to the substrate surface. The LEED patterns from the thin films show that the overlayers are highly ordered with a square unit cell of approximately 14 Å x14 Å aligned along the <110> axes of the Au(001) surface. The additional high resolution photoelectron spectroscopy data prove that CoPc and FePc overlayers on (001) single crystal gold substrates remain stoichiometric and molecular.

Acknowledgements: This work was supported by the DFG (no. 436RUS17/52/06), SFB 463 and RFBR (Grant No 05-02-17390).