1. Institute
of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany
2. Institute
of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
3. Deutsches Elektronen-Synchrotron
DESY, Notkestraße 85, 22607 Hamburg, Germany