期刊
NANO ENERGY
卷 99, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2022.107386
关键词
Piezoelectric; Pulse sensor; Pulsed laser; Carbon nanotube; Zinc stannate; Polyvinylidene fluoride
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2022R1A2C2008406, 2022R1C1C22007492, 2019R1I1A3A0106266212]
- U.S. National Science Foundation [DMR-2004455]
- National Research Foundation of Korea [2022R1A2C2008406] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Recent progress in piezoelectric-based wearable devices has achieved high-performance energy harvesting for human-sensing applications. However, existing piezoelectric nanomaterials have low piezoelectricity, limiting the industrial-scale development of efficient piezoelectric devices. This study demonstrates a peapod-inspired design, in which ZnSnO3 anchored on surface-modified carbon nanotubes, significantly enhances the piezoelectricity of P(VDF-TrFE)-based nanofibers. These nanofibers show great potential for use in flexible energy-harvesting and pulse-sensing systems, with high output power and imperceptible pulse detection.
High-performance energy harvesting for human-sensing applications has been achieved through recent progress in piezoelectric-based wearable devices. Piezoelectric nanomaterials can be leveraged for flexibility and biocompatibility while also enhancing piezoelectricity. However, such nanomaterials exhibit low piezoelectricity, limits the industrial-scale development of highly efficient piezoelectric devices. Hence, design of novel materials to significantly enhance piezoelectricity is necessitated. Herein, we demonstrate that a peapod-inspired design in which ZnSnO3 anchored on surface-modified carbon nanotubes (CNT) allows significant enhancement of the piezoelectricity produced by poly(vinylidene fluoride-co-trifluoroethylene)-based (P(VDF-TrFE)-based) nanofibers (a piezoelectric material). The piezoelectric properties were exploited for the application of the as prepared nanofibers (NFs) in flexible NFs in energy-harvesting and pulse-sensing systems, which demonstrated high output power ((97.5 V and 1.16 mu A) as well as imperceptible pulse detection even in posterior tibial arteries. This work provides the scientific and engineering framework for delivering ZnSnO3-surface-modified CNT-P (VDF-TrFE) NFs excellent piezoelectric performance for use in piezoelectric devices.
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