1. School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
2. Centre
for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang
Drive, 637553, Singapore
3. Department
of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
4. School
of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore