Corresponding Author

San-Yuan Chen

Department of Materials Science and Engineering, National Yang-Ming Chiao Tung University, Hsinchu, 300 Taiwan, ROC

Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300 Taiwan, ROC

School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, 807 Taiwan, ROC

Graduate Institute of Biomedical Science, China Medical University, Taichung, 406 Taiwan, ROC

E-mail: irradiance@so-net.net.tw; tcliu24@stanford.edu; sanyuanchen@mail.nctu.edu.tw