1. Materials and Energy Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Paschim Boragaon, Vigyan Path, Guwahati 35, India
2. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
3. Department of Physics, Gauhati University, Gopinath Bordoloi Nagar, Guwahati, Assam 781014, India
4. Department of Chemistry, Gauhati University, Gopinath Bordoloi Nagar, Guwahati, Assam 781014, India