1. Department of Materials Science and EngineeringCenter for Chronic Brain InjuryThe Ohio State University Columbus OH 43210 USA
2. Center for Bio‐Integrated ElectronicsSimpson Querrey Institute for BioNanotechnologyDepartment of Materials Science and EngineeringBiomedical EngineeringChemistry, Mechanical Engineering, Electrical Engineering and Computer Science, and Neurological SurgeryMcCormick School of Engineering and Feinberg School of MedicineNorthwestern University Evanston IL 60208 USA
3. Department of Materials Science and EngineeringFrederick Seitz Materials Research LaboratoryUniversity of Illinois at Urbana‐Champaign Urbana IL 61801 USA