1. Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Fuzhou China
2. Department of Chemistry National University of Singapore Singapore Singapore
3. Tianjin Key Laboratory of Composite and Functional Materials, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering Tianjin University Tianjin China
4. Department of Physics National University of Singapore Singapore Singapore