1. Integrative Sciences and Engineering Programme NUS Graduate School National University of Singapore 21 Lower Kent Ridge Road Singapore 119077 Singapore
2. Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore 6 Science Drive 2 Singapore 117564 Singapore
3. Department of Electrical and Computer Engineering National University of Singapore 4 Engineering Drive 3 Singapore 117583 Singapore
4. Department of Chemistry National University of Singapore 3 Science Drive Singapore 117543 Singapore
5. Hybrid Materials of OptoElectronics group Department of Molecules and Materials MESA+ Institute for Nanotechnology and Center for Brain‐Inspired Nano Systems (BRAINS) Faculty of Science and Technology University of Twente P.O. Box 217 Enschede 7500 AE The Netherlands