1. Sri Lanka Institute of Nanotechnology (SLINTEC), Nanotechnology and Science Park, Mahenwatte, Pitipana, Homagama 10200, Sri Lanka
2. Department of Veterinary Pathobiology, Faculty of Veterinary Medicine, University of Peradeniya, Peradeniya 20400, Sri Lanka
3. Electrical Engineering Division, Department of Engineering, University of Cambridge, 9 J. J. Thomson Avenue, Cambridge CB3 0FA, U.K.
4. Department of Chemistry, University of Colombo, Colombo 00300, Sri Lanka