1. 1Department of Chemistry, School of Engineering, University of Petroleum & Energy Studies, Energy Acres, Bidholi, Dehradun - 248 007, Uttarakhand, India
2. 2Department of Physics, School of Engineering, University of Petroleum & Energy Studies, Energy Acres, Bidholi, Dehradun - 248 007, Uttarakhand, India
3. 3Centre for Interdisciplinary Research & Innovation, University of Petroleum & Energy Studies, Energy Acres, Bidholi, Dehradun - 248 007, Uttarakhand, India