1. School of Chemical
and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457
2. Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, Singapore 138634
3. NTU-Northwestern
Institute for Nanomedicine, Nanyang Technological University, 50 Nanyang
Drive, Singapore 637553