1. International Collaborative Laboratory of 2D Materials for Optoelectronics Science and TechnologyShenzhen University Shenzhen 518060 China
2. Department of PhysicsFaculty of ScienceNational University of Singapore Singapore 117542 Singapore
3. Singapore Synchrotron Light Source (SSLS)National University of Singapore Singapore 117603 Singapore
4. Institute of Materials Research and EngineeringA∗STAR (Agency for Science, Technology and Research) 2 Fusionopolis Way Singapore 138634 Singapore
5. NUS Graduate School for Integrative Sciences and EngineeringNational University of Singapore Singapore 117456 Singapore
6. Centre for Advanced 2D Materials and Graphene Research CentreNational University of Singapore Singapore 117551 Singapore
7. NUSNNI‐NanoCoreNational University of Singapore Singapore 117576 Singapore
8. Energy Research Institute @ NTU (ERI@N)Research Techno Plaza X‐Frontier Block, Level 5, 50 Nanyang Drive Singapore 637553 Singapore
9. Department of Materials Science and MetallurgyUniversity of Cambridge Cambridge CB30FS UK