1. Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, China
2. School of Biomedical Engineering, Sun Yat-sen University Guangzhou 511434, China
3. Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China
4. Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong SAR, China