1. Center for research in nanotechnology and science, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India
2. Department of Chemistry and ‡Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Pune, Dr. Homi Bhabha Road, Pune 411008, India
3. Department of Physics, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India
4. Applied Materials India Pvt. Ltd., Exploration Center Lab., Hillside Road, Inside IIT Bombay
campus, Powai, Mumbai 400076, India
5. Department of Chemistry, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India