1. Ningbo Institute of Material Technology and Engineering; Key Laboratory of Graphene Technologies and Applications of Zhejiang Province; Chinese Academy of Science; Zhongguan West Road 1219 315201 Ningbo China
2. University of Chinese Academy of Science; Beijing 100049 China
3. Chair of Macromolecular Chemistry; School of Science; Technische Universität Dresden; Mommsenstr. 4 01069 Dresden Germany