1. Department of Precision InstrumentCenter for Brain Inspired Computing ResearchBeijing Innovation Center for Future ChipTsinghua University Beijing 100084 China
2. Center for NanochemistryBeijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking University Beijing 100871 China
3. School of Life SciencesTsinghua‐Peking Joint Center for Life SciencesIDG/McGovern Institute for Brain ResearchTsinghua University Beijing 100084 China
4. School of Aerospace EngineeringTsinghua University Beijing 100084 China
5. Department of Electronic EngineeringTsinghua University Beijing 100084 China