1. Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611
2. Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
3. Department of Restorative Dental Sciences, University of Florida, Gainesville, Florida 32610
4. Department of Electrical and Computer Engineering, University of Florida, Gainesville, Florida 32611
5. Department of Orthopaedics and Rehabilitation, University of Florida, Gainesville, Florida 32610
6. Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611