1. Department of Materials Science and Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong SAR 999077 P. R. China
2. College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
3. Center of Super‐Diamond and Advanced Films (COSDAF) City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong SAR 999077 P. R. China