1. Advanced Carbon Products and Metrology Department, CSIR-National Physical Laboratory (CSIR-NPL), New Delhi 110012, India
2. Academy of Scientific and Innovative Research, Ghaziabad 201002, India
3. Department of Physics, Manipur University, Canchipur, Manipur 795003, India
4. Department of Physics, National Institute of Technology Kurukshetra, Kurukshetra, Haryana 136119, India
5. Light Stock Processing Division, CSIR-Indian Institute of Petroleum, Dehradun 248005, India