1. Department of Materials Science and Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL 60208, USA.
2. Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA.
3. Department of Civil and Environmental Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL 60208, USA.
4. Department of Mechanical Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL 60208, USA.
5. Department of Biological Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611 USA.
6. Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL 60208, USA.
7. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China.
8. Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
9. Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago IL 60611 USA.
10. Gatorade Sports Science Institute, 617 W. Main St., Barrington, IL 60010, USA.
11. Epicore Biosystems Inc., Cambridge, MA 02139, USA.
12. Departments of Chemistry, and Electrical Engineering and Computer Science, McCormick School of Engineering, Northwestern University, Evanston, IL 60208, USA.