Regensburg 2010 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 26: Poster Session
MM 26.79: Poster
Dienstag, 23. März 2010, 14:45–16:30, Poster C
Self-organized growth of helicenes on calcite (104) surfaces: Monte Carlo Simulations and Experiments — •Tobias Richter1, Philipp Rahe2, Markus Nimmrich2, Mario Einax1, Martin Körner1,3, Angelika Kühnle2, and Philipp Maass1,3 — 1Institut für Physik, Technische Universität Ilmenau, 98684 Ilmenau, Germany — 2Institut für Physikalische Chemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany — 3Fachbereich Physik, Universität Osnabrück, 49069 Osnabrück, Germany
Helicene molecules deposited on calcite(104) substrates form one-dimensional double-strands along the [010] direction of the (104) surface. These effectively one-dimensional morphologies show a particular ripening process in the post-nucleation regime due to strong anisotropic diffusion. Kinetic Monte Carlo simulations and extensions of mean-field rate equations are presented to model the increase of the mean chain length of the helicene clusters in dependence of the annealing time. The ripening process exhibits two characteristic time regimes in agreement with the experimental observations.