1. Department of Materials Science and Engineering, Department of Chemistry, and Center of Super-Diamond Advanced Films, City University of Hong Kong, Kowloon Tong 999077, Hong Kong SAR, China
2. Frontier Research Center on Fundamental and Applied Sciences of Matters and Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
3. School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia