A Graphical Pressure Sensor Array with Multilayered Structure Based on Graphene and Paper Substrate

Abstract Paper‐based flexible pressure sensors have received extensive attention owing to their recoverability and accessibility. This study, proposes a graphical pressure sensor array with a multilayered structure. A simple writing method is adopted to realize the adsorption of sensitive materials on the fiber structure of cellulose paper. Pressure sensors with 1, 3, 5, and 7 stacked layers are fabricated and compared. The results show that the seven‐layer sensor achieves a high sensitivity (44 kPa –1 ) and fast time response (less than 150 ms). The highly sensitive stacked paper‐based sensor array realizes the pressure detection in objects and special‐shaped surfaces. A pressure sensor based on a commercial corrugated box is also fabricated for comparison. The corrugated carton array is used to switch the reminder devices for convenience and accessibility. Because many scenarios require a safe distance to be maintained, particularly under the influence of COVID‐19, the writable paper‐based sensor array is used to realize graphical distance perception and provide warnings.