1. Department
of Materials Science and Engineering, Beckman Institute for Advanced
Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
2. Weldon
School of Biomedical Engineering, School of Mechanical Engineering,
The Center for Implantable Devices, and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
3. Dow Electronic Materials, 455 Forest Street, Marlborough, Massachusetts 01752, United States
4. The Dow Chemical Company, 2301 North Brazosport Boulevard, Freeport, Texas 77541, United States
5. Center
for Neuroscience Imaging Research (CNIR), Institute of Basic Science
(IBS); School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 440-746, Korea