1. Department of Materials Science and Engineering; National University of Singapore (NUS); Singapore 117574 Singapore
2. NUS Graduate School for Integrative Sciences and Engineering; National University of Singapore; 13 Centre for Life Sciences, #05-01, 28 Medical Drive Singapore 117456 Singapore
3. School of Materials Science and Engineering; Beihang University; Beijing 100191 China
4. Department of Materials Science; Sichuan University; Chengdu 610064 China
5. NUSNNI-NanoCore; National University of Singapore; Singapore 117411 Singapore
6. Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
7. Centre for Advanced 2D Materials (CA2DM); National University of Singapore; 6 Science Drive 2 Singapore 117546 Singapore