Electrostatic sensing technology is widely utilized in both military andcivilian applications, including electrostatic prevention in gas stations andvarious electronic devices. The high sensitivity of electrostatic sensor iscapable to detect not only weak electrostatic charges, but also the weakdisturbance of electrostatic field in distant. Here, we present ahigh-performance graphene-based electrostatic sensor. Combining the ultrahighmobility of graphene and the long lifetime of carriers in lightly doped SiO2/Sisubstrate, our device achieves a fast response of ~2 us and detection limit ofelectrostatic potential as low as ~5 V, which is improved by an order ofmagnitude as compared to commercial product. The proposed device structureopens a promising pathway to high-sensitive electrostatic detection, and alsogreatly facilitates the development of novel sensors, e.g. portable andflexible electrostatic sensor.
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