1. The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
2. Department of Physics, The City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China.
3. Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA.
4. Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA.
5. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
6. Department of Applied Science and Technology, University of California, Berkeley, Berkeley, CA 94720, USA.
7. College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation, Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China.
8. Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, SAR, Hong Kong, China.
9. Department of Materials Science and Engineering, The City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, SAR, Hong Kong, China.
10. Polymer Science and Engineering Department, Conte Center for Polymer Research, University of Massachusetts, 120 Governors Drive, Amherst, MA 01003, USA.
11. Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
12. Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan.