1. Sri Lanka Institute of Nanotechnology (SLINTEC), Nanotechnology & Science Park, Mahenawatta, Pitipana, 10200 Homagama, Sri Lanka
2. Department of Chemistry, University of Sri Jayewardenepura, 10250 Nugegoda, Sri Lanka
3. Department of Geology, University of Peradeniya, 20400 Peradeniya, Sri Lanka
4. Department of Chemical and Process Engineering, University of Moratuwa, 10400 Moratuwa, Sri Lanka
5. Department of Chemistry, University of Peradeniya, 20400 Peradeniya, Sri Lanka