Flexible and wide pressure range triboelectric sensor array for real-time pressure detection and distribution mapping
Force distribution measurements are useful for wearable electronic devices designed for monitoring human health and disease diagnosis. However, the measuring pressure of traditional pressure sensors based on conductive materials is only in kPa range, thereby not conducive to sustain pressures in the MPa range. In this study, a self-powered and flexible pressure sensor array (PSA) was developed for detection of both magnitude and distribution of pressures around 1.1 MPa generated during mechanical movement. The cuboid-array-structured single-electrode mode triboelectric nanogenerator (C-TENG) showed output voltage signals generated by changes in deformation-induced electrostatic potential. The output voltage of a single C-TENG device varied linearly with the applied pressure. Furthermore, the sensitivity and measuring range of PSA can be regulated by designing cuboid-array-structure parameter and adjusting Young’s modulus of silicone rubber (SR) by incorporating dopamine modified BaTiO3 (BT). Dopamine was employed as a modifier of BT nanoparticles to improve the interfacial compatibility between the inorganic filler and SR matrix. In summary, the proposed self-powered SPA with a wide working pressure range and high flexibility looks very promising for construction of future advanced wearable medical electronic devices.
- This article is part of the themed collection: Journal of Materials Chemistry A HOT Papers