1. Department of Chemistry, Karnatak University, Dharwad-580003, Karnataka, India
2. Department of Physics, Faculty of Engineering & Technology, Jain (Deemed-to-be University), Bangalore 562112, India
3. Department of Physics, BMS College of Engineering, Bangaluru-560017, India
4. Department of Studies in Physics, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
5. Department of Chemistry, Howard University, Washington, DC 20059, USA
6. Maratha Mandal's Central Research Laboratory, Marathamandal Dental College and Research Centre, Belgaum, Karnataka, India