Effect of electrode material on piezoelectric output of PVDF sensor with electrospun nanofiber web

Hu, Jiyong; Gu, Yaodong; Hele, Zhang; Zhu, Yibo; Xudong, Yang

doi:10.5185/amlett.2018.1958

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…A prototype system was designed to mimic the natural biological response to bending, tapping, and pushing [36]. The schematic of this prototype is shown Journal of Materials Science and Chemical Engineering (Figure 15).…”

Section: Prototype and Proof Of Conceptmentioning

confidence: 99%

Creation of a Novel Piezoelectric Nanogenerator for Sensory Receptor Damage Treatments

Joshi¹

2023

MSCE

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Every year, millions of people incur damage to sensory receptors that interact with the external environment. Two areas of concern are hearing loss (affecting around 430 million) and burns (affecting 11 million annually). Current treatments for burns involve skin grafts, which are expensive and prone to rejection by the body. Current treatments for hearing loss involve implants and hearing aids, which have limited sensitivity, need batteries and charging, are expensive, and are prone to infection. Thus, there is a need for a self-powered, flexible, biocompatible, antibacterial, and inexpensive solution that can respond to stimuli at a rate comparable to tissue. Piezoelectric materials convert mechanical energy into electricity, thus replicating touch and hearing by simulating nerve signals. In this study, piezoelectric membranes with varying ratios of polyvinylidene fluoride (PVDF) and zinc oxide (ZnO) were fabricated using electrospinning. These membranes were characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), stress-strain analysis, and piezoresponse testing. Results showed that increasing the amount of PVDF made the membrane more flexible but reduced its piezoelectric potential (decrease in PVDF β-phase). Increasing the amount of ZnO significantly increased piezoelectric potential (increase in PVDF β-phase) but degraded the flexibility and usability of the membrane. Therefore, a 1:1 w/w ratio of PVDF to ZnO is the optimum ratio for balancing both piezoelectric potential and flexibility. These results support the hypothesis that composites of PVDF and ZnO can help realize self-powered hearing rehab devices and wearable electronic skin.

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Section: Prototype and Proof Of Conceptmentioning

confidence: 99%

Creation of a Novel Piezoelectric Nanogenerator for Sensory Receptor Damage Treatments

Joshi¹

2023

MSCE

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Boosting the Piezoelectric Sensitivity of Amino Acid Crystals by Mechanical Annealing for the Engineering of Fully Degradable Force Sensors

Cheng

et al. 2023

Advanced Science

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Biodegradable piezoelectric force sensors can be used as implantable medical devices for monitoring physiological pressures of impaired organs or providing essential stimuli for drug delivery and tissue regeneration without the need of additional invasive removal surgery or battery power. However, traditional piezoelectric materials, such as inorganic ceramics and organic polymers, show unsatisfactory degradability, and cytotoxicity. Amino acid crystals are biocompatible and exhibit outstanding piezoelectric properties, but their small crystal size makes it difficult to align the crystals for practical applications. Here, a mechanical-annealing strategy is reported for engineering all-organic biodegradable piezoelectric force sensors using natural amino acid crystals as piezoelectric materials. It is shown that the piezoelectric constant of the mechanical-annealed crystals can reach 12 times that of the single crystal powders. Moreover, mechanical annealing results in flat and smooth surfaces, thus improving the contact of the crystal films with the electrodes and leading to high output voltages of the devices. The packaged force sensors can be used to monitor dynamic motions, including muscle contraction and lung respiration, in vivo for 4 weeks and then gradually degrade without causing obvious inflammation or systemic toxicity. This work provides a way to engineer all-organic and biodegradable force sensors for potential clinical applications.

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Effect of electrode material on piezoelectric output of PVDF sensor with electrospun nanofiber web

Cited by 2 publications

References 21 publications

Creation of a Novel Piezoelectric Nanogenerator for Sensory Receptor Damage Treatments

Creation of a Novel Piezoelectric Nanogenerator for Sensory Receptor Damage Treatments

Boosting the Piezoelectric Sensitivity of Amino Acid Crystals by Mechanical Annealing for the Engineering of Fully Degradable Force Sensors

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