1. Department of Chemistry
and Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, North Carolina
27708-0346, United States
2. State Key Laboratory
of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Science, Changchun 130022, People's Republic of China
3. Department of Biomedical
Engineering, Duke University, Durham, North Carolina 27708-0281, United States
4. Department of Microbiology, St. Marianna University School of Medicine, Kawasaki 216-8511, Japan