Abstract
AbstractPaper‐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.
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