1. Department of Materials Science and EngineeringNorthwestern University Evanston IL 60208 USA
2. Department of Materials Science and EngineeringFrederick Seitz Materials Research LaboratoryUniversity of Illinois at Urbana‐Champaign Urbana IL 61801 USA
3. Department of Materials Science and EngineeringCenter for Chronic Brain InjuryThe Ohio State University Columbus OH 43210 USA
4. State Key Laboratory of Structural Analysis for Industrial EquipmentDepartment of Engineering MechanicsInternational Research Center for Computational MechanicsDalian University of Technology Dalian 116024 P. R. China
5. Department of Biomedical EngineeringDuke University Durham NC 27708 USA
6. Center for Bio‐Integrated ElectronicsNorthwestern University Evanston IL 60208 USA
7. School of Electrical and Electronic EngineeringYonsei University Seoul 03722 Republic of Korea
8. Department of ChemistryUniversity of Illinois at Urbana‐Champaign Urbana IL 61801 USA
9. Department of Civil and Environmental EngineeringMechanical EngineeringMaterials Science and EngineeringCenter of Bio‐Integrated electronicsNorthwestern University Evanston IL 60208 USA
10. Center for Bio‐Integrated ElectronicsSimpson Querrey Institute for BioNanotechnologyDepartment of Materials Science and EngineeringBiomedical EngineeringChemistryMechanical EngineeringElectrical Engineering and Computer Science, and Neurological SurgeryMcCormick School of Engineering and Feinberg School of Medicine Northwestern University Evanston IL 60208 USA