1. Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters; National Tsing Hua University; Hsinchu 30013 Taiwan
2. Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry; City University of Hong Kong; Hong Kong SAR
3. Department of Chemistry; National Taiwan University; Taipei 10617 Taiwan
4. Department of Materials Science and Engineering and Department of Chemistry; City University of Hong Kong; Hong Kong SAR