1. Department of Physics, National University of Singapore, 2 Science Drive 3,
Singapore 117542
2. School
of Materials Science
and Engineering, Nanyang Technological University, 639798 Singapore
3. Singapore Institute of Manufacturing Technology, 638075, Singapore
4. Shaanxi
Key Laboratory of Degradable
Biomedical Materials, School of Chemical Engineering, Northwest University, Xi’an, Shaanxi 710069,
China
5. School of Physics, National University of Ireland Galway, Galway, Ireland
6. Institute of Materials Research and Engineering, A*STAR (Agency for Science,
Technology and Research), 3 Research Link, 117602, Singapore
7. Department of Engineering and
Applied Science, Cranfield University,
Defence Academy of the United Kingdom, Shrivenham SN6 8LA, United
Kingdom