1. CAS Key Laboratory of Nanosystem and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology Beijing 100190 P. R. China
2. Department of Physics Chemistry and Biology (IFM)Linköping University Linköping SE‐581 83 Sweden
3. Emergent Functional Polymers Research TeamRIKEN Center for Emergent Matter, Science (CEMS) 2‐1 Hirosawa Wako 351‐0198 Japan
4. Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China