1. Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu District, Tamilnadu, India
2. Department of Physics, SRM Valliammai Engineering College, Kattankulathur 603203, Chengalpattu District, Tamilnadu, India
3. Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu District, Tamilnadu, India