1. Department of Chemistry, National University of Singapore, 117543, Singapore
2. Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore
3. Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road Jurong Island, 627833, Singapore
4. School of Materials Science and Engineering, UNSW, Sydney, NSW 2052, Australia
5. Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, 999077, Hong Kong China
6. Institute of Materials Research and Engineering, Agency for Science, Technology and Research, 117602, Singapore