1. Centre for Nanoscience and Nanotechnology (CNSNT), Siksha ‘O’ Anusandhan, Bhubaneswar 751030, India
2. Physical and Material Chemistry Division, CSIR-NCL Pune, Dr Homi Bhabha Road, Pune 411008, India
3. Functional Materials Laboratory, PSG Institute of Advanced Studies, Coimbatore, 641004, India