1. Energy Research Institute, Nanyang Technological University, 50 Nanyang Drive, 637553 Singapore
2. School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798 Singapore
3. Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257 CEA−CNRS−UM−ENSCM, Centre de Marcoule, BP 17171, 30207 Bagnols-sur-Cèze Cedex, France
4. School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551 Singapore