1. Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India
2. Department of Chemical Sciences, University of Johannesburg, Doorfontein, Johannesburg 2028, South Africa
3. Centre for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre, Council for Scientific and Industrial Research, Pretoria 0001, South Africa
4. Department of Industrial and Applied Chemistry, Ramakrishna Mission Vidyamandira, Belur Math, Howrah 711202, India
5. Department of Environmental Studies, Centre for Distance and Online Education, Rabindra Bharati University, EE Block, Sector II, Bidhannagar, Kolkata, West Bengal 700091, India
6. Center for Research in Nanoscience and Nanotechnology, Acharya Prafulla Chandra Roy Sikhsha Prangan, University of Calcutta, JD-2, Sector-III, Saltlake City, Kolkata 700098, India