1. School of Chemical EngineeringSichuan University Chengdu 610065 P. R. China
2. CAS Key Laboratory of Molecular Nanostructure and NanotechnologyCAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences (BNLMS)Institute of ChemistryChinese Academy of Sciences (CAS) Beijing 100190 P. R. China
3. Institute for Superconducting and Electronic MaterialsUniversity of Wollongong Wollongong NSW 2522 Australia
4. Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of Sciences (CAS) Beijing 100190 P. R. China
5. Institute of Materials for Energy and EnvironmentLaboratory of New Fiber Materials and Modern TextileGrowing Basis for State Key LaboratoryCollege of Materials Science and EngineeringQingdao University Qingdao 266071 P. R. China