1. Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
2. Institute of Experimental Physics, Faculty of Mathematic, Physics and Informatics, Gdańsk University, Wita Stwosza 57, 80-308 Gdańsk, Poland
3. National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
4. Department of Mechanical Engineering, Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan