1. NTU-Northwestern Institute for Nanomedicine (NNIN), Interdisciplinary Graduate School (IGS), Nanyang Technological University (NTU), 50 Nanyang Drive, 637553 Singapore
2. School of Materials Science and Engineering (MSE), Nanyang Technological University (NTU), 639798 Singapore
3. Department of Physics, University of Warwick, Coventry CV4 7AL, U.K.
4. ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute (IPRI), Australian Institute of Innovative Materials (AIIM), University of Wollongong, Wollongong, NSW 2522, Australia
5. State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
6. Centre for Nano and Soft Matter Sciences, Jalahalli, Bengaluru 560013, India
7. Tata Steel Ltd., Jamshedpur 831001, India
8. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore