1. Christian Doppler Laboratory for Polymer/Metal Interfaces, Max-Planck-Insitut für Eisenforschung GmbH, Max-Planck-Strasse 1, D-40237 Düsseldorf, Germany
2. Technical and Macromolecular Chemistry, University of Paderborn, Warburgerstrasse 100, D-33098 Paderborn, Germany