1. School of Materials Science and Engineering, Nanyang Technological University, Singapore
2. Institute for Digital Molecular Analytics and Science, Nanyang Technological University, Singapore
3. Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore
4. Innovative Centre for Flexible Devices (iFLEX), Max Planck–NTU Joint Lab for Artificial Senses, and with the Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore