1. Division of Engineering Product Development Singapore University of Technology and Design 8 Somapah Rd Singapore 487372 Republic of Singapore
2. Department of Mechanical Materials, and Manufacturing Engineering The University of Nottingham Ningbo, China 199 Taikang East Road Ningbo 315100 China
3. Centre for Nanofibers and Nanotechnology Department of Mechanical Engineering National University of Singapore Singapore 117574 Singapore