1. Department of Chemistry National Taiwan University Taipei 106 Taiwan
2. Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei 11031 Taiwan
3. Research Center for Applied Sciences Academia Sinica Taipei 106 Taiwan
4. College of Chemistry & Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China
5. National Synchrotron Radiation Research Center Hsinchu 300 Taiwan