1. Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
2. Centre
for Bioimaging Sciences and Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
3. Department
of Physics, National University of Singapore, 2 Science Drive 3, 117551, Singapore
4. NUSNNI-NanoCore, National University of Singapore, 5A Engineering
Drive 1, 117411, Singapore
5. Centre
for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546, Singapore
6. Institute
of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, 138634, Singapore
7. Department
of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, 117575, Singapore