Ag Nanowire-Based Omnidirectional Stretchable Sensing Array for Independent Pressure–Strain Detection

Abstract

As conventional strain measuring can be merely realized in one particular direction by strain sensors and could not meet the demand of flexible skin-based structures (FSSs), an omnidirectional strain-sensing array equipped with an independent measurement of pressure and strain is assembled. Vacuum filtration was applied to fabricate AgNWs/graphene-based sensing materials, and the substrate structure was optimized using a vertical circular cavity to realize pressure measurement. In addition, the isolation of pressure and strain data was controlled by changing the thickness-related stiffness of the substrate. These approaches demonstrate potential ways of solving data coupling and their compatibility with the current multiparameter measurement