1. Department of Chemistry, National University of Singapore, 117543 Singapore
2. College of Material and Textile Engineering, Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing University, Jiaxing 314001, Zhejiang, People’s Republic of China
3. Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
4. Institute for Functional Intelligent Materials, National University of Singapore, 117544 Singapore