Regensburg 2000 – wissenschaftliches Programm

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O: Oberflächenphysik

O 21: Oberflächenreaktionen (II)

O 21.10: Vortrag

Dienstag, 28. März 2000, 18:30–18:45, H44

Orientation and Self-Assembly of hydrophobic fluoro-alcyl-silanes — •D. Schondelmaier, J. Morenzin, S. Cramm, and W. Eberhardt — Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich

Water repelling coatings combined with structured surfaces are the major key for the recently discussed ’self-cleaning mechanism’[1]. In the search of highly hydrophobic substances fluoro-alcyl-silanes prove to be an interesting representative of this kind. Optimization of the applications of such molecular coatings requires a deep understanding of the structure and a detailed characterization of the layers. With synchrotron radiation (XANES, X-Ray Absorption Near Edge Spectroskopy) we were able to show a high degree of orientation of tridecafluoro-octyl-triethoxy-silane molecules on different substrates. The analysis of the structure of the layers shows a strong bond of a single layer of molecules to the substrates. Further layers can weakly bind to the monolayer.

[1] W.Barthlott and C. Neinhuis, Planta, 202, 1 (1997)