1. Department of Physics, Arignar Anna Govt. Arts College, Cheyyar, Tamilnadu, India
2. Department of Physics, Panimalar Engineering College, Chennai, Tamilnadu, India
3. Department of Physics, Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Chennai, Tamil Nadu, India
4. Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
5. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany