1. Department of Physics, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, Tamil Nadu, India;
2. Department of Chemistry, Anna University, Guindy, Chennai, Tamil Nadu, India;
3. Department of Biochemistry, St. Peter’s Institute of Higher Education and Research, Chennai, Tamil Nadu, India;
4. Department of Chemistry, Madras Christian College, Tambaram, Chennai, Tamil Nadu, India;
5. Department of Physics, Arignar Anna Government Arts College, Cheyyar, Tamil Nadu, India