1. Department of Materials Engineering, Faculty of Engineering, Sri Lanka Institute of Information Technology, Malabe, Colombo 10115, Sri Lanka
2. Faculty of Humanities and Sciences, Sri Lanka Institute of Information Technology, Malabe, Colombo 10115, Sri Lanka
3. Department of Chemistry, Faculty of Science, University of Colombo, Colombo 3 00300, Sri Lanka
4. Faculty of Engineering, University of Technology Sydney (UTS), P.O. Box 123, Broadway, NSW 2127, Australia
5. Faculty of Sciences & Technology (RealTek), Norwegian University of Life Sciences, P.O. Box N-1432 Ås 1430, Norway
6. Department of Nano Science Technology, Wayamba University of Sri Lanka, Kuliyapitiya 60200, Sri Lanka