Self-adhesive Crystal-enhanced multilayer nanofilm piezoelectric sensor for motion monitoring

Abstract

This study presents a multifunctional piezoelectric sensor with a self-adhesive multilayer nanofilm structure fabricated through electrospinning technology, tailored for long-term biomechanical monitoring. The sensor integrates a self-adhesive ABS/PVA composite substrate, a NiO/BaTiO₃-enhanced P(VDF-TrFE) piezoelectric layer, and Au electrodes deposited via PVD, forming a stable and flexible structure. The results demonstrate that the NiO/BaTiO₃ nanoparticles significantly improve β-phase crystallinity, leading to a 13-fold increase in the piezoelectric coefficient (d₃₃) at optimal doping levels. Additionally, the ABS/PVA substrate exhibits strong self-adhesive properties, ensuring seamless skin attachment without external adhesives, while maintaining high mechanical robustness. The sensor exhibits stable and sensitive signal outputs under various bending and compression conditions, making it a promising candidate for wearable electronics, real-time motion monitoring, and bio-integrated sensing applications.