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

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.

Automated summary

This study proposes a multilayered paper-based pressure sensor array with sensitive materials adsorbed on the fiber structure of the paper using a simple writing method. Experimental results show that the 7-layer sensor has high sensitivity and fast response time, suitable for pressure detection on objects and special surfaces, as well as for switching reminder devices.