1. School of Electrical and Electronic Engineering, University of Manchester, Manchester, UK
2. School of Materials, University of Manchester, Manchester, UK
3. Department of Physics, College of Education for Pure Science, University of Anbar, Anbar, Iraq
4. Manchester Institute of Biotechnology, University of Manchester, Manchester, UK
5. Physics Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
6. National Graphene Institute, University of Manchester, Manchester, UK