High-performance graphene-based electrostatic field sensor

TL;DR

This paper introduces a high-performance graphene-based electrostatic sensor with ultrahigh sensitivity, fast response, and low detection limit, advancing electrostatic sensing technology for various applications.

Contribution

It presents a novel graphene-based sensor combining high mobility and substrate properties to significantly improve electrostatic detection capabilities.

Findings

Response time of ~2 microseconds

Detection limit of ~5 volts electrostatic potential

Improved sensitivity by an order of magnitude over commercial sensors

Abstract

Electrostatic sensing technology is widely utilized in both military and civilian applications, including electrostatic prevention in gas stations and various electronic devices. The high sensitivity of electrostatic sensor is capable to detect not only weak electrostatic charges, but also the weak disturbance of electrostatic field in distant. Here, we present a high-performance graphene-based electrostatic sensor. Combining the ultrahigh mobility of graphene and the long lifetime of carriers in lightly doped SiO2/Si substrate, our device achieves a fast response of ~2 us and detection limit of electrostatic potential as low as ~5 V, which is improved by an order of magnitude as compared to commercial product. The proposed device structure opens a promising pathway to high-sensitive electrostatic detection, and also greatly facilitates the development of novel sensors, e.g. portable and flexible electrostatic sensor.