1. Department
of Materials Science and Engineering, National Chiao Tung University, No. 1001, Ta-Hsueh Rd., Hsinchu, Taiwan 300, Republic of China
2. Department
of Chemistry, Tunghai University, No. 181, Sec. 3, Taichung Port Rd., Taichung, Taiwan 407, Republic of China
3. Department
of Materials Science and Engineering, Carnegie Mellon University, No.5000
Forbes Avenue, Wean Hall 3325, Pittsburgh, Pennsylvania 15213, United States
4. Interdisciplinary
Institute of Neuroscience and Technology, Zhejiang University, No.866 Yuhangtang Rd., Hangzhou, Zhejiang Province 310058, China
5. Department
of Biomedical Engineering, National Yang Ming University, No.155,
Sec. 2, Linong St., Taipei, Taiwan 112, Republic of China
6. Department
of Biomedical Engineering, University of Michigan, No.2200 Bonisteel
Boulevard, Ann Arbor, Michigan 48109-2099, United States