1. School of Materials Science and EngineeringNanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
2. The Cambridge Centre for Advanced Research and Education in Singapore 1 CREATE Way Singapore 138602 Singapore
3. School of Chemical and Biomedical EngineeringNanyang Technological University 62 Nanyang Dr Singapore 637459 Singapore
4. Department of Chemical Engineering and BiotechnologyWest Cambridge Site Philippa Fawcett Drive Cambridge CB3 0AS UK