1. Singapore-Peking University Research Centre, Campus for Research Excellence & Technological Enterprise (CREATE), Singapore 138602
2. Department
of Materials Science and Engineering, Peking University, Beijing 100871, People’s Republic of China
3. Institute
of Modern Physics, Northwest University, Xi’an 710069, People’s Republic of China
4. School
of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
5. School
of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798