Berlin 2012 – scientific programme

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O: Fachverband Oberflächenphysik

O 58: Poster Session III (Solid/liquid interfaces; Metals; Semiconductors; Oxides and insulators)

O 58.29: Poster

Wednesday, March 28, 2012, 18:15–21:45, Poster B

Adsorption of fluorinated and non-fluorinated CuPc on Ag(111) — •Christoph Kleimann, Sonja Schröder, Benjamin Stadtmüller, Ingo Kröger, Christa Elsaesser, and Christian Kumpf — Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany and Jülich-Aachen Research Alliance (JARA) - Fundamentals of Future Information Technology

Organic thin films usually exhibit a variety of different structures when they adsorb on metal surfaces, depending on the particular interface properties. It is our goal to obtain a fundamental understanding of molecular assembly and the interaction characteristics for both, organic-metal contacts and hetero-organic interfaces.

Here we present results on the adsorption of copper(II)-hexadecafluoro-phthalocyanine (F16CuPc) on Ag(111). We have used spot-profile-analysis LEED (SPA-LEED) for identifying different phases, and scanning tunneling microscopy (STM) as well as x-ray standing waves (XSW) for further characterization.

At low coverages and room temperature a disordered phase is observed. When the first monolayer is closed, the molecules arrange themselves in long rows. Along the rows the molecules are very well ordered, but neighboring rows are often slightly shifted with respect to each other, which is reflected by well defined streaks in the SPA-LEED images.

We also present first results obtained for mixed layers of fluorinated and non-fluorinated molecules (F16CuPc and CuPc).