1. College of Materials Science and Engineering Qingdao University Qingdao 266071 P. R. China
2. Key Laboratory of Polymer Chemistry and Physics of Ministry of Education School of Materials Science and Engineering Peking University Beijing 100871 P. R. China
3. MacDiarmid Institute for Advanced Materials and Nanotechnology School of Chemical and Physical Sciences Victoria University of Wellington Wellington 6010 New Zealand
4. Department of Mechanical and Aerospace Engineering Syracuse University Syracuse NY 13244 USA
5. State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 P. R. China
6. Center for Advanced Low‐Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China