1. National University of Singapore (NUS) Graduate School (NGS) for Integrative Sciences and Engineering, Centre for Life Sciences (CeLS), 05-01, 28 Medical Drive, Singapore 117456, Singapore
2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore,
3. National University of Singapore, Singapore 117576, Singapore
4. Department of Materials, Imperial College London, London SW7 2AZ, England, UK
5. National University of Singapore, Singapore 117576, Singapore, King Saud University, P.O. Box 2425, Riyadh 11451, Saudi Arabia, Institute of Materials Research and Engineering, 3, Research Link, Singapore 117602, Singapore