1. AML Department of Engineering Mechanics Center for Flexible Electronics Technology Tsinghua University Beijing 100084 China
2. Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China
3. Center for Bio‐Integrated Electronics Northwestern University Evanston IL 60208 USA
4. Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA
5. Department of Mechanical Engineering Northwestern University Evanston IL 60208 USA
6. Department of Civil and Environmental Engineering Northwestern University Evanston IL 60208 USA
7. Simpson Querrey Institute Northwestern University Chicago IL 60611 USA
8. Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA