1. Beijing National Laboratory for Molecular Sciences (BNLMS) Laboratory of Polymer Physics and Chemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
2. University of Chinese Academy of Sciences Beijing 100049 China
3. Oak Ridge National Laboratory Neutron Scattering Division One Bethel Valley Road Oak Ridge TN 37831 USA
4. Oak Ridge National Laboratory Chemical Sciences Division One Bethel Valley Road Oak Ridge TN 37831 USA
5. Spallation Neutron Source Science Center Dongguan 523803 China
6. Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China
7. Polymer Science and Engineering Department University of Massachusetts Amherst Amherst MA 01003 USA
8. Materials Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA