1. Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 2030, 12840 Prague 2, Czech Republic
2. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
3. Helmholtz Institute Ulm, Helmholtzstraße 11, 89081 Ulm, Germany
4. European Synchrotron Radiation Facility, 71, avenue des Martyrs, 38043 Cedex 9 Grenoble, France