Carbon-Based Pressure Sensors With Wavy Configuration

We demonstrate all-solution-processed pressure sensors consisting of carbon-based nano-composites with a wavy configuration using patterned polydimethylsiloxane molds. The sensitivity of the proposed sensors was increased by 36% at the applied pressure levels of 1 k N/m
²
. Significantly, the resistance was mostly recovered after a release from 3 M N/m
²
without conspicuous hysteresis, and a very stable and robust operation was secured during the pressure and release cycle. Compared with the as-supplied pressure-sensitive rubber films, the carbon-based nano-composite with a wavy configuration exhibited gradual changes, including a linear change in the low-pressure regime.