1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
2. Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
3. Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 310401, Taiwan
4. Center for Measurement Standards, Industrial Technology Research Institute, Hsinchu 30011, Taiwan