1. Department of ChemistryIndian Institute of Engineering Science and Technology, Shibpur Howrah 711103 West Bengal India
2. Department of Physics Jadavpur UniversityJadavpur University Campus Area, Jadavpur, 188, Raja S.C. Mallick Rd Kolkata West Bengal 700032 India
3. Institute of Nano Science & Technology (INST) Habitat Centre, Phase 10, Sector 64, Mohali Punjab 160062 India