Dresden 2006 – wissenschaftliches Programm

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SYSS: Structure Formation and Self-Organization in non-equilibrium Systems

SYSS 3: Structure Formation and Self-Organization in non-equilibrium Systems - Poster

SYSS 3.4: Poster

Donnerstag, 30. März 2006, 16:00–18:00, P1

Simulation of Liesegang Pattern Formation of Nano Particles in Glass — •Jan W. Kantelhardt — Fachbereich Physik und Zentrum für Computational Nanoscience, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle (Saale), Germany

By numerical simulations we study diffusion-reaction processes that lead to the self organized formation of Liesegang patterns of metal nano particles in glass. Liesegang patterns are a quasi-periodic structuring that occurs in diffusion limited chemical reactions with two components. Such patterns have been observed in experiments with different metal nano particles in silicate glass. We compare results for the Ostwald Prager model and for the competitive particle growth model. Based on Monte Carlo simulations with cellular automata models we study the stability of the pattern formation process as well as its possible modification by modulated external parameters, and we compare with previous mean-field results.