Berlin 2008 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

DF: Fachverband Dielektrische Festkörper

DF 5: Scanning and diffraction methods

DF 5.5: Vortrag

Montag, 25. Februar 2008, 16:10–16:30, EB 407

Growth of C₆₀ islands on TiO₂(110) — •Felix Loske, Frank Ostendorf, Michael Reichling, and Angelika Kühnle — Department of Physics, University Osnabrück, Germany

We have investigated the interaction of C₆₀ molecules with a dielectric substrate, namely rutile TiO₂(110). Non-contact atomic force microscopy was used to study the adsorption structure and surface mobility in situ at room temperature. At submonolayer coverage the molecules adsorb preferencially at substrate step edges. Upon increasing coverage, islands grow from the decorated step edges on the lower terraces in an island growth mode. Simultaneous imaging of the substrate’s bridging oxygen rows and the C₆₀ island structure revealed that the C₆₀ molecules are arranging in a rhombic supercell, with the molecules lying centered in the troughs between the bridging oxygen rows of the substrate. Domain boundaries were determined to run parallel to the supercell’s basis vectors and are characterized by a single strand of protruding C₆₀ molecules along the junction.