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

Abstract

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.

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High-Performance Graphene Flexible Sensors for Pulse Monitoring and Human–Machine Interaction

“…In recent years, flexible pressure sensors have gradually integrated into modern life in medical health monitoring, − electronic skin, , and human–machine interaction. , Among them, flexible sensors are the best option for the next generation in a variety of wearable electronics due to their high sensitivity, − fast signal response, , low production cost, , and stable stability. , The sensing materials of flexible sensors are usually nanomaterials with excellent electrical conductivity, including nanoparticles, , carbon nanotubes, , graphene, − metal nanowires, and porous silicon . Among the aforementioned materials, graphene exhibits a number of advantageous properties, including high carrier mobility, excellent mechanical strength, high conductivity, and thermal properties.…”