1. School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
2. State Key Laboratory of Analytical Chemistry for Life and Collaborative Innovation Center of Chemistry for Life Sciences; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P.R. China
3. Singapore Centre for Environment Life Science, Engineering Nanyang Technological University; 60 Nanyang Drive Singapore 637551 Singapore
4. School of Civil and Environmental Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
5. School of Chemistry and Life Science; Nanjing University Jingling College; Nanjing 210089 P.R. China
6. Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore