1. Department
of Polymer Science, College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
2. Institut
Charles Sadron, CNRS, Université de Strasbourg, 23, Rue
du Lœss, 67034 Strasbourg, France
3. Key Laboratory of Polymer Chemistry & Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China