1. School of Life Science, Anhui University, Hefei, P. R. China.
2. Department of Chemistry, Anhui University, Hefei, P. R. China.
3. Institute of Physical Science and Information Technology, Anhui University, Hefei, P. R. China.
4. Department of Materials, Imperial College London, London, UK.
5. Institute of Physics, Chinese Academy of Sciences, Beijing, P. R. China.
6. Institute for the Physics of Living Systems, University College London, London, UK.
7. Institute for Bioengineering of Catalonia, Barcelona Institute for Science and Technology, Barcelona, Spain.
8. Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain.