1. Department of Polymer Science Faculty of Applied Sciences University of Sri Jayewardenepura, Gangodawila Nugegoda 10250 Sri Lanka
2. Department of Physics Faculty of Natural Sciences Open University of Sri Lanka, Nawala Nugegoda 11222 Sri Lanka
3. Center for Advanced Material Research (CAMR) Faculty of Applied Sciences University of Sri Jayewardenepura, Gangodawila Nugegoda 10250 Sri Lanka