1. CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyCAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology Beijing 100190 China
2. University of Chinese Academy of Sciences Beijing 100049 China
3. Department of Electronics and NanoengineeringAalto University Espoo FI‐00076 Finland
4. State Key Laboratories of Transducer TechnologyChinese Academy of Sciences Beijing 100190 China
5. CAS Center for Excellence in Brain Science and Intelligence Technology 320 Yue Yang Road Shanghai 200031 China