1. AML Department of Engineering Mechanics Center for Flexible Electronics Technology Tsinghua University Beijing 100084 P. R. China
2. School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 P. R. China
3. Department of Neurosurgery Beijing Tsinghua Changgung Hospital School of Clinical Medicine Tsinghua University Beijing 102218 P. R. China
4. School of Materials Science and Engineering Tsinghua University Beijing 100084 P. R. China
5. Institute of Advanced Structure Technology Beijing Key Laboratory of Lightweight Multi‐Functional Composite Materials and Structures Beijing Institute of Technology Beijing 100081 P. R. China