1. Department of Chemistry, Sri Shakthi Institute of Engineering and Technology, Coimbatore, India
2. Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore, India
3. Department of Physics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore, India
4. Department of Applied Physics, Research Unit Plasma Technology (RUPT), Faculty of Architecture and Engineering, Ghent University, Ghent, Belgium
5. Department of Physics, Institute of Chemical Technology, Mumbai, India