1. School of Engineering and Materials Science
2. Queen Mary University of London
3. London E1 4NS
4. UK
5. Department of Physics
6. King's College London
7. London WC2R 2LS
8. School of Physics and Electronic Information Engineering
9. Henan Polytechnic University
10. Jiaozuo 454000
11. China
12. School of Biological and Chemical Sciences