Synergistically enhanced piezoelectric output in highly aligned 1D polymer nanofibers integrated all-fiber nanogenerator for wearable nano-tactile sensor
2018; Elsevier BV; Volume: 53; Linguagem: Inglês
10.1016/j.nanoen.2018.08.036
ISSN2211-3282
AutoresSujoy Kumar Ghosh, Dipankar Mandal,
Tópico(s)Conducting polymers and applications
ResumoLightweight tactile sensor with multimodal capabilities such as, wearability, self-powered operation, and mechanical robustness are of paramount importance in emerging portable electronics that involves human–machine integration. In this effort, an all-fiber wearable nanogenerator (NG) is designed, where, platinum (Pt) nano-particles (NPs) interfaced highly aligned 1D poly(vinylidene fluoride) (PVDF) nano-fibers arrays (Pt-PVDF NFs) is sandwiched between flexible conducting fabrics, consisting of interlocking micro-fibers arrays. In-situ ternary synergistic enhancement of piezoelectricity in nano-dimensionally confined 1D Pt-PVDF NFs arises from extensional force exertion on electrified solution jets, mechanical stretching on rapid collection and Pt-NPs interfacing with macromolecular PVDF chain. As a consequence, mechanically robust structure of Pt-PVDF NFs possess 5 times enhanced piezoelectric figure of merit (FoMp≈5×10−11Pa−1) in comparison to pure PVDF nano-fibers (FoMp≈9.7×10−12Pa−1). In addition, owing to the geometrical stress confinement effect, the Pt-PVDF NFs based piezoelectric nanogenerator (PtPENG) is proven to be a high-performance (output voltage, Voc~ 30 V and current, Isc~ 6 mA cm−2) and durable (~ 90,000 cycles) power generating device (output power, 22 µW cm−2) for small power consumer electronics. Importantly, PtPENG is demonstrated as a static strain-sensitive wearable tactile sensor that paves the way to improve human personalized healthcare monitoring system.
Referência(s)