1. Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 P. R. China
2. Division of Chemistry and Analytical Science National Institute of Metrology Beijing 100029 P. R. China
3. Department of Medical Biochemistry and Microbiology Uppsala University Uppsala 75123 Sweden
4. School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 P. R. China