1. Department of Nanotechnology, V.V.P. Engineering College, Rajkot, India
2. Department of physics, H&HB Kotak Institution of Science, Rajkot, India
3. Department of Nanoscience and Advanced Materials, Saurashtra University, Rajkot, India
4. Department of Physics, Saurashtra University, Rajkot, India
5. UGC: Human Resource Development Centre, Saurashtra University, Rajkot, India