1. School of Materials Science and Engineering, Nanyang Technological University, Singapore
2. Key Laboratory of Science and Technology of Eco-Textile, Jiangnan University, Wuxi, China
3. Environmental Chemistry and Materials Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore
4. Center for Nanotechnology and Nanotoxicology, Harvard T.h. Chan School of Public Health, Harvard University, Boston, Massachusetts, USA