[1] Natl Taiwan Normal Univ, Dept Phys, Taipei 11677, Taiwan
[2] Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan
[3] Natl Taipei Univ Technol, Dept Mech Engn, Taipei 10608, Taiwan
[4] Natl Taipei Univ Technol, Grad Inst Mfg Technol, Taipei 10608, Taiwan
[5] Acad Sinica, Nanosci & Technol Program, Taiwan Int Grad Program, Taipei 10617, Taiwan
[6] Natl Taiwan Univ, Taipei 10617, Taiwan
[7] Philippine Text Res Inst, Dept Sci & Technol, Taguig City 1631, Philippines
[8] Gdansk Univ, Inst Expt Phys, Fac Math Phys & Informat, PL-80308 Gdansk, Poland
[9] Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan