1. Department of Mechanical Engineering, National University of Singapore, Singapore 117574, Republic of Singapore
2. Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Republic of Singapore
3. Division of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Republic of Singapore
4. Department of Chemistry, Birla Institute of Technology & Science, Pilani−Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad 500 078, Telangana, India
5. Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117574, Republic of Singapore
6. Centre for Nanofibers and Nanotechnology, National University of Singapore, Nanoscience and Nanotechnology Initiative, 2 Engineering Drive 3, Singapore 117576, Republic of Singapore
7. Electronics and Photonics Department, Institute of High Performance Computing, A*STAR (Agency for Science, Technology and Research), 1 Fusionopolis Way, Connexis, Singapore 138632, Republic of Singapore