title: Modelling molecule-surface interactions--an automated quantum-classical approach using a genetic algorithm.
abstract: We present an automated and efficient method to develop force fields for molecule-surface interactions. A genetic algorithm (GA) is used to parameterise a classical force field so that the classical adsorption energy landscape of a molecule on a surface matches the corresponding landscape from density functional theory (DFT) calculations. The procedure performs a sophisticated search in the parameter phase space and converges very quickly. The method is capable of fitting a significant number of structures and corresponding adsorption energies. Water on a ZnO(0001) surface was chosen as a benchmark system but the method is implemented in a flexible way and can be applied to any system of interest. In the present case, pairwise Lennard Jones (LJ) and Coulomb potentials are used to describe the molecule-surface interactions. In the course of the fitting procedure, the LJ parameters are refined in order to reproduce the adsorption energy landscape. The classical model is capable of describing a wide range of energies, which is essential for a realistic description of a fluid-solid interface.
authors: Center of Smart Interfaces-TU Darmstadt, Petersenstr. 32, 64287 Darmstadt, Germany.
authors: Claudia R
authors: CR
authors: Herbers
authors: Karen
authors: K
authors: Johnston
authors: Nico F A
authors: NF
authors: van der Vegt