1. Department of Physics, Bharathidasan University Constituent College for Women, Orathanadu, Tamil Nadu, India
2. PG & Research Department of Physics, A.V.V.M. Sripushpam College (Autonomous), Poondi, Tamil Nadu, India
3. UNESCO-UNISA Africa Chair in Nanoscience’s Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Pretoria, South Africa
4. Nanosciences African Network (NANOAFNET), Materials Research Group (MRG), iThemba LABS-National Research Foundation (NRF), Somerset West, Western Cape Province, South Africa
5. Department of Physics, Khadir Mohideen College, Adirampattinam, Tamil Nadu, India