Abstract
The flexible wearable sensors with high sensitivity and stability provide wide potential in artificial intelligence and human–machine interaction. However, dual-modal sensor with contact and non-contact working mode based on a facile and cost-effective methodology which can recognize external stimulus forms remains a challenge. Especially, magnetic non-contact sensing performance has gained increasing attention in smart wearable device. This work reports a flexible and magnetic sensor based on a sandwich structure film (SSF) which can detect both tension and bending stimuli by supplementing opposite electric signal feedbacks. Notably, the ΔR/R0 of SSF sensor reaches 44.1% at 5% tensile strain and it presents excellent stability even after 10,000 cycles. Moreover, the ΔR/R0 of SSF sensor maintains at −17.2% under 2 mm bending displacement. Additionally, SSF sensor can be employed as electronic skin to perceive the human joint motion in real-time. Furthermore, the direction and density of magnetic field applied to SSF sensor can be clearly discriminated, thus a non-contact magnetic keyboard has been designed and developed. As a result, the facile manufacturing processes and outstanding multifunctional sensing characteristics endow SSF sensor with high implementation potential in the next-generation intelligent electronic equipment or systems.
Published Version
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