1. Institute of Materials Research and Engineering
2. Agency for Science
3. Technology and Research (A*STAR)
4. Singapore 117602
5. Singapore
6. Division of Chemistry and Biological Chemistry
7. School of Physical and Mathematical Sciences
8. Nanyang Technological University
9. Singapore 637371
10. Department of Chemistry
11. The Hong Kong University of Science & Technology
12. Kowloon
13. China