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DS: Fachverband Dünne Schichten

DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films

DS 42.48: Poster

Mittwoch, 16. März 2011, 15:00–17:30, P1

Molecular anchoring on metal surfaces — Albano Cossaro², Dean Cvetko^1,3, Luca Floreano², •Michele Puppin^1,2,4, Alberto Verdini², and Alberto Morgante^1,2 — ¹Department of Physics, University of Trieste, Trieste, Italy — ²CNR-IOM, Laboratorio TASC, Trieste, Italy — ³Department of Physics, University of Ljubljana, Ljubljana, Slovenia — ⁴Department of Physical Chemistry, Fritz Haber Institut der Max Planck Gesellschaft, Berlin, Germany

The possibility to control the structural properties of interface layers of an organo-metallic system is a major task of nano-devices engineering. In many cases, a Self Assembled Monolayer (SAM) is used for anchoring molecules or proteins to the substrate or, in organic electronics, for modifying the surface of metallic electrodes in contact with the organic active layers. The Au(111) surface can be functionalized with amine (-NH2) groups by growing a SAM of cysteamine in ultra-high vacuum. The modified surface is used to anchor molecules with a carboxylic (-COOH) functional group. The amine binds to the carboxylic group leading to a second layer in which the anchored molecules have a well defined orientation. To describe the formation and the final geometry of the organic structure we used XPS (X-ray Photoelectron Spectroscopy) and NEXAFS (Near Edge X-ray Absorption Fine Structure) spectroscopies.