1. Sri Lanka Institute of Nanotechnology, Mahenwatta, Pitipana, Homagama 10206, Sri Lanka
2. Department of Chemistry/Center for Advanced Materials Research, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Soratha Mawatha, Nugegoda 10250, Sri Lanka
3. Department of Materials and Mechanical Technology, Faculty of Technology, University of Sri Jayewardenepura, Pitipana, Homagama 10206, Sri Lanka
4. Department of Chemistry, University of Peradeniya, Peradeniya 20400, Sri Lanka