1. Center for Bio‐Integrated ElectronicsNorthwestern University Evanston IL 60208 USA
2. Department of Mechanical EngineeringDepartment of Civil and Environmental EngineeringDepartment of Materials Science and EngineeringNorthwestern University Evanston IL 60208 USA
3. School of Aeronautic Science and EngineeringBeihang University Beijing 100191 P. R. China
4. School of Chemical EngineeringSungkyunkwan University (SKKU) Suwon 16419 Republic of Korea
5. Frederick Seitz Materials Research LaboratoryDepartment of Materials Science and EngineeringUniversity of Illinois at Urbana–Champaign Urbana IL 61801 USA
6. Center for Bio‐Integrated ElectronicsDepartment of Mechanical EngineeringDepartment of Civil and Environmental EngineeringDepartment of Materials Science and EngineeringNorthwestern University Evanston IL 60208 USA
7. Center for Flexible Electronics TechnologyApplied Mechanics LaboratoryDepartment of Engineering MechanicsTsinghua University Beijing 100084 P. R. China
8. Department of Materials Science and EngineeringBiomedical Engineering, Neurological Surgery, Chemistry, Mechanical Engineering, Electrical Engineering and Computer Science Simpson Querrey Institute and Feinberg Medical SchoolCenter for Bio‐Integrated ElectronicsNorthwestern University Evanston Evanston IL 60208 USA