1. Department of Chemical and Biochemical
Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
2. Department of Fibre and Polymer
Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
3. Department of Chemistry, University of Copenhagen, Thorvaldsensvej 40, DK-1871
Frederiksberg C, Denmark
4. DST/CSIR Nanotechnology Innovation
Centre, National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, P.O.
Box 395, Pretoria 0001, Republic of South Africa