1. Department of Chemistry, Sardar Vallabhbhai National Institute of Technology (SVNIT), Ichchhanath, Surat-395 007, Gujarat, India
2. Solid State Physics Division, Bhabha Atomic Research Centre (BARC), Trombay, Mumbai-400 085, Maharashtra, India
3. Department of Chemistry, Veer Narmad South Gujarat University (VNSGU), Surat-395 007, Gujarat, India