**Author details**

Raunak Kumar Tamrakar1 \* and Kanchan Upadhyay2

1 Department of Applied Physics, Bhilai Institute of Technology (Seth Balkrishan Memorial), Durg, Chhattisgarh, India

2 International and Inter University Centre of Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala, India

\*Address all correspondence to: raunak.ruby@gmail.com

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