1. Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Section 4, Keelung Road, Taipei, 106, Taiwan
2. Protrustech Corporation Limited, 3F.-1, No. 293, Section 3, Dongmen Rd. East District, Tainan, 701, Taiwan
3. Department of Applied Physics, National University of Kaoshiung, Kaoshiung, 811, Taiwan