1. Centre for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
2. Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
3. Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, Illinois 60439, United States
4. Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
5. Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 10608, Taiwan
6. Physics and Chemistry of Materials, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
7. Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
8. Research Center for Applied Science, Academia Sinica, Taipei 11529, Taiwan
9. Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
10. Center of Atomic Initiative for New Materials, National Taiwan University, Taipei 10617, Taiwan
11. Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan