1. Department of Chemistry, National Institute of Technology Nagaland, Chumukedima, Dimapur 797103, India
2. UCD Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
3. Biophysical Chemistry Laboratory, CSIR─Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata 700032, India
4. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India