1. Laboratory for Chemistry of Novel Materials; University of Mons-UMONS; Place du Parc 20 B-7000 Mons Belgium
2. Max Planck Institute for Polymer Research; Ackermannweg 10 55128 Mainz Germany
3. Department of Materials Science and Engineering; Stanford University; Stanford California 94305 USA
4. School of Chemistry and Biochemistry; School of Materials Science and Engineering; Georgia Institute of Technology; 901 Atlantic Drive Atlanta GA 30332-0400 USA