1. Department of Physics, SJVP College Autonomous, Harihara, Karnataka, India
2. Department of Physics, Bangalore University, Bengaluru, Karnataka, India
3. Department of Physics, PES University, Bengaluru, Karnataka, India
4. Department of Post-graduate Studies and Research in Polymer Science, Sir M. Visvesvarayya Post-Graduate Centre, University of Mysore, Mandya, Karnataka, India