1. Functional Nanomaterials and Polymer Nanocomposite Laboratory, Department of Physics, VIT-AP University, Amaravati, Andhra Pradesh, India
2. New Technologies - Research Center, University of West Bohemia, Plzeň, Czech Republic
3. Department of Physics, Kristu Jayanti College, Bangalore, India
4. Department of Physics, VIT University, Vellore, Tamilnadu, India