Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 75: Nanotribology II
O 75.4: Vortrag
Donnerstag, 25. März 2010, 15:45–16:00, H36
Friction Force Microscopy on a Layer Compound with Organic Surfaces — •Gregor Fessler1, Iwan Zimmermann2, Thilo Glatzel1, Sascha Koch1, Pascal Steiner1, Enrico Gnecco1, Tony Keene2, Shi-Xia Liu2, Silvio Decurtins2, and Ernst Meyer1 — 1Dept. of Physics, University of Basel — 2Dept. of Chemistry and Biochemistry, University of Bern
We investigated the surface structure of a layer compound crystal formed by a stack of copper oxalate layers sandwiched between stereoregular organic cations. Friction force microscopy in ultra-high vacuum on the (001) surface revealed a friction contrast between different molecular rows along the [100] direction. High resolution measurements were possible without any preparation of the sample in ultra-high vacuum. Excellent agreement with the experimental results is obtained with numeric simulations reproducing the scan process based on the phenomenological Prandtl-Tomlinson model in 2D.