1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
3. Division of Science, Yale-NUS College, Singapore 138527
4. Institute of High Performance Computing, Agency for Science, Technology and Research (A*STAR), Singapore 138632
5. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States