1Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
2Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore
3Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
4Shaanxi Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
5National Synchrotron Light Source, Brookhaven National Lab, Upton, New York, 11973, United States
6Institute of High Performance Computing, Agency for Science, Technology and Research (A∗STAR), 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632, Singapore
7Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A⁎STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Singapore
8SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology of Ministry of Education, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
9Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore, 117546, Singapore
10Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, Singapore 627833, Singapore