1. School of Materials Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Jadavpur, Kolkata-700032, India
2. Department of Chemistry, University of Calcutta, University College of Science, Kolkata 700009, India
3. Department of Chemistry, St. Xavier's College (Autonomous), Kolkata, India
4. Department of Materials Science & Metallurgy, University of Cambridge, UK