1. Division
of Materials Science, Korea Basic Science Institute, Daejeon 305-333, Republic of Korea
2. Korea Standards Research Institute of Food and Drug, Busan 607-120, Republic of Korea
3. Department
of Fine Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea
4. Department
of Energy Engineering, Dankook University, Cheonan 330-714, Republic of Korea
5. Bio & New Materials Business Team, National Nanofab Center, Daejeon 305-701, Republic of Korea
6. Department
of Biological Engineering, College of Engineering, Inha University, Incheon 402-751, Republic of Korea