Ab Initio Design of Graphene Block Enables Ultrasensitivity, Multimeter‐Like Range Switchable Pressure Sensor

Abstract In pursuit of the next‐generation pressure sensors, the fabrication of graphene‐based devices is considered to be one of the most promising approaches to address the unsatisfied sensitivity within a wide pressure range. Here, an ab initio design based on the graphene block is proposed to realize a high‐performance and multimeter‐like range switchable pressure sensor. The sensor contains three designed graphene‐based foams with different initial resistances, which enable continuous resistance‐change behavior induced by the pressure. Specifically, the reduced graphene oxide (rGO) foam–based sensor demonstrates a three times resistance change within the pressure range of 0–300 Pa, the rGO/polyurethane (rGO/PU) foam–based sensor presents a six times resistance change within the pressure range of 0.09–30 kPa, and the selenium‐functionalized rGO/PU (SFrGO/PU) foam–based sensor displays a resistance change of more than 1000‐fold within the pressure range of 1–72 kPa. Such different initial resistances and responses endow the device with controllable estimating pressure ranges, offering a switchable multimeter‐like function for various applications. This ab initio design, which is applicable to various 2D materials and operation modes, can provide a facile and feasible approach toward the next‐generation pressure sensors and other application fields related to 2D materials.