1. Centre of Foundation Studies, Universiti Teknologi MARA, Cawangan Selangor; Kampus Dengkil 43800 Dengkil Selangor Malaysia
2. Institute of Physical Chemistry, University of Hamburg; Grindelallee 117 20146 Hamburg Germany
3. Helmholtz-Zentrum Geesthacht, Institute of Polymer Research; Max-Planck-Str. 1 21502 Geesthacht Germany
4. Faculty of Applied Sciences, Universiti Teknologi MARA; 40450 Shah Alam Selangor Malaysia