1. Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Ramanagara, Bangalore 562112, Karnataka, India
2. Centre for Nano and Soft Matter Sciences, Jalahalli, Bangalore 560013, Karnataka, India
3. Department of Physics, SRM University, Amaravati 522240, Andhra Pradesh, India
4. Department of Instrumentation & Applied Physics, Indian Institute of Science, Bangalore 560012, Karnataka, India
5. Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, 15 Broadway, Sydney 2007, New South Wales, Australia