1. Department of Chemistry, National Changhua University of Education, 1 Jin-De Road, Changhua City 50007, Taiwan
2. Department of Physics, Gadjah Mada University, Yogyakarta 55281, Indonesia
3. School of Post-Baccalaureate Chinese Medicine, China Medical University, 91, Hsueh-Shih Road, Taichung 40424, Taiwan
4. Department of Chemistry, University of Wisconsin-Platteville, 1, University Plaza, Platteville, WI 53818-3099, USA
5. Department of Applied Science, National Taitung University, 369, Sec. 2, University Road, Taitung 950309, Taiwan