1. DST Unit of Nanoscience (DST UNS), and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology, Madras, Chennai−600036, India
2. Department of Physics, Indian Institute of Science Education, and Research Bhopal, Bhopal−462066, India
3. Sophisticated Analytical Instruments Facility (SAIF), Indian Institute of Technology, Madras, Chennai−600036, India
4. Department of Synthesis, Institute of Inorganic Chemistry, The Czech Academy of Science, 1001 Husinec-Rez, 25068 Rez, Czech Republic