1. Center of Super-Diamond and Advanced Films (COSDAF); Department of Materials Science and Engineering; City University of Hong Kong; Tat Chee Avenue 83 Kowloon Hong Kong 518000 China
2. Hong Kong Branch of National Precious Metals Material Engineering Research Center; City University of Hong Kong; Kowloon Hong Kong 518000 China
3. Centre for Advanced Structural Materials; City University of Hong Kong Shenzhen Research Institute; 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park Nanshan District Shenzhen 518000 China
4. Department of Chemistry; City University of Hong Kong; 83 Tat Chee Avenue Kowloon Hong Kong 518000 China