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CPP: Chemische Physik und Polymerphysik

CPP 2: Polymer Surfaces II

CPP 2.2: Vortrag

Montag, 8. März 2004, 11:15–11:30, H 37

Homo- and heteropolymer adsorption onto homogeneous and chemically structured surfaces: the role of correlations — •Alexey Polotsky, Andreas Degenhard, and Friederike Schmid — Universität Bielefeld, Fakultät für Physik, Universitätsstraße 25, 33615 Bielefeld

Using a variational approach, an analytical theory of adsorption was developed for the following systems: (1) random heteropolymers with exponentially decaying and/or oscillating sequence correlations near planar homogeneous surfaces; (2) homogeneous polymers near planar heterogeneous surfaces; (3) random heterogeneous polymers near planar heterogeneous surfaces. In all three cases simple equations for the adsorption-desorption transition line were obtained. Some of these results as well as the validity of the applied variational technique were tested by a comparison with numerical lattice calculations.