1. Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
2. Center for Bio-Integrated Electronics, Simpson Querrey Institute for BioNanotechnology, Northwestern University, Evanston, Illinois 60208, United States
3. Department of Chemical Engineering, Northwestern University, Evanston, Illinois 60208, United States
4. Department of Materials Science and Engineering, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
5. Department of Mechanical Engineering, Northwestern University, Evanston, Illinois 60208, United States
6. Epicore Biosystems, Inc., Cambridge, Massachusetts, 02139, United States
7. Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, United States
8. Department of Chemistry and Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States