1. Department of Physics, University of Lucknow, Lucknow, Uttar Pradesh, India
2. Computational Materials Science Laboratory, Department of Physics, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, Uttar Pradesh, India
3. Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan, West Bengal, India