Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)

O 59.1: Poster

Mittwoch, 24. März 2010, 17:45–20:30, Poster B1

Monte Carlo simulations of nucleation processes on pre-patterned surfaces — •Stefan Frieder Hopp and Andreas Heuer — Institut für Physikalische Chemie, Universität Münster, 48149 Münster, Germany

The properties of template-directed nucleation are studied on a microscopic level by applying the kinetic Monte Carlo method. In this context, the conditions for full nucleation control as well as the progression of cluster growth with increasing coverage are investigated. The shape and the height of the clusters are discussed for 1D and 2D patterns with reference to the experimental observations.

It is shown that the simulation results of a continuous Monte Carlo algorithm can be approximated quite well using a discrete Monte Carlo technique based on the lattice gas model. In the course of this approach the latter algorithm is modified by the introduction of barriers depending on the particular diffusion process on the surface. Furthermore, the underlying discrete pair potential is adjusted to the Lennard-Jones potential. The application of the discrete method leads to a dramatic reduction of simulation time and thus allows in particular a more detailed comparison with experimental data.