1. Centre for Advanced Materials and Devices (CAMD), Department of Chemistry, University of Colombo, Colombo 00300, Sri Lanka
2. Sri Lanka Institute of Nanotechnology (SLINTEC), Nanotechnology and Science Park, Mahenwatte, Pitipana, Homagama 10200, Sri Lanka
3. UCL School of Pharmacy, University College London, 29−39 Brunswick Square, London WC1N 1AX, United Kingdom