1. Department of Physics Indian Institute of Technology Patna Patna Bihar 801106 India
2. Department of Physics College of Science United Arab Emirates University Al‐Ain UAE
3. School of Industrial Engineering Purdue University West Lafayette IN 47907 USA
4. Department of Chemistry Indian Institute of Technology Madras Chennai 600036 India
5. Centre for Nanoscience and Nanotechnology Amity University Mumbai Mumbai Maharashtra 410206 India
6. School of Materials Engineering Purdue University West Lafayette IN 47907 USA
7. Birck Nanotechnology Centre Purdue University West Lafayette IN 47907 USA