1. NUS Graduate School
for Integrative Sciences and Engineering, Centre for Life Sciences
(CeLS), 28 Medical Drive, Singapore 117597, Singapore
2. Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
3. Institute of Materials Research
and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore
4. Graphene Research Centre, Faculty of Science, National University of Singapore, 6 Science
Drive 2, Singapore 117546, Singapore
5. Solar Energy Research Institute of Singapore (SERIS), National University of Singapore, Block E3A, 7 Engineering Drive 1, Singapore 117574, Singapore