Affiliation: | 1. School of Materials Science and Engineering, Nanyang Technological University, Singapore;2. Centre for Biomimetic Sensor Science, Nanyang Technological University, Singapore;3. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, P.R. China;4. School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore |