1. School of Applied Sciences (Physics), REVA University, Bengaluru-560064, India
2. Department of Physics, R.V. College of Engineering, Bengaluru-560059, India
3. Center of Excellence on Macro-Electronics, Interdisciplinary Research Center, R.V. College of Engineering, Bengaluru-560059, India
4. School of Chemistry, Cardiff University, Cardiff CF10 3AT, Wales, UK