High Anti-Jamming Flexible Capacitive Pressure Sensors Based on Core-Shell Structured AgNWs@TiO2

Flexible capacitive pressure sensors play an important role in electronic skin and human-machine interaction due to their high sensitivity and convenient preparation, comparing with those resistive/piezoresistive sensors. However, due to the complexity of the application environment, reported capacitive sensors often experience signal instability by electromagnetic interference and proximity effects. The great challenge for capacitive sensors is to maintain sensitivity and wide linear range while reducing interference. This study proposes a high anti-jamming capacitive flexible pressure sensor with polyvinylidene fluoride (PVDF)@AgNWs@TiO2 film as the dielectric layer. Core-shell structure-based AgNWs@TiO2 is embedded into the PVDF film. The introduction of the core-shell structure not only enhances the initial capacitance but also balances the dielectric constant, dielectric loss, and breakdown strength of the dielectric layer. The sensor is validated to exhibit a high signal-to-noise ratio for a variety of interference sources and is demonstrated with an intelligent glove sensing system, which provides a new idea for developing a high anti-jamming capacitive flexible pressure sensor.