1. Department of Environmental Science and EngineeringIndian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826 004 India
2. Centre for Research in Nanoscience and NanotechnologyUniversity of Calcutta Salt Lake, Sector-III, Block -JD2 Kolkata 700 106 India
3. Department of Material Science and EngineeringTripura University (A Central University) Tripura 799 022 India