Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163834 - 163834
Published: May 1, 2025
Language: Английский
Annual Review of Biomedical Engineering, Journal Year: 2025, Volume and Issue: 27(1), P. 255 - 282
Published: May 1, 2025
With increasing demands for continuous health monitoring remotely, wearable and implantable devices have attracted considerable interest. To fulfill such demands, novel materials device structures been investigated, since commercial biomedical are not compatible with flexible conformable form factors needed soft tissue intervention. Among various materials, piezoelectric widely adopted multiple applications including sensing, energy harvesting, neurostimulation, drug delivery, ultrasound imaging owing to their unique electromechanical conversion properties. In this review, we provide a comprehensive overview of piezoelectric-based devices. We first the basic principles design strategies factors. Then, discuss state-of-the-art strategies. Finally, demonstrate several challenges outlooks designing
Language: Английский
Citations
0
Science Advances, Journal Year: 2025, Volume and Issue: 11(19)
Published: May 7, 2025
Achieving efficient mechanical biosignal detection remains challenging due to these signals’ weak and dispersed nature. Piezoelectrets, known for their piezoelectric properties, offer promising potential pressure sensors flexible energy-harvesting devices. In this study, we present a piezoelectret film of polyvinylidene fluoride- co -trifluoroethylene featuring cross-scale pores, sandwiched between two fluorinated ethylene propylene layers. The patterned pores enable the storage substantial net charges, resulting in dense network oriented space charges. Under loadings, charges undergo notably relative displacements induce variations local electric field, with an effective coefficient up 2.1 × 10 4 picocoulombs per newton. This sandwich-structured allows real-time monitoring biosignals minimal inputs. For example, light finger touch generates charge pulses exceeding 100 V, whereas wrist yield high-fidelity, high-voltage signals. work advances field flexible, self-powered electronics by providing high-performance material, setting benchmark sensitivity scalability detection.
Language: Английский
Citations
0
Science Advances, Journal Year: 2025, Volume and Issue: 11(19)
Published: May 7, 2025
Hearing loss, affecting individuals of all ages, can impair education, social function, and quality life. Current treatments, such as hearing aids implants, aim to mitigate these effects but often fall short in addressing the critical issue accurately pinpointing sound sources. We report an intelligent system inspired by human auditory system: asymmetric well-aligned piezoelectric nanofibers combined with neural networks mimic natural processes. Piezoelectric spirally varying lengths directions transmit convert acoustic into mechanoelectrical signals, mimicking complex cochlear dynamics. These signals are then encoded digital networks, enabling accurate direction recognition. This surpasses directional hearing, recognizing horizontally vertically. The advancement represents a substantial stride toward next-generation artificial harmonizing transduction perception nature-inspired design. It promises for applications aids, wearable devices, offering enhanced experiences those impairments.
Language: Английский
Citations
0
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163755 - 163755
Published: May 1, 2025
Language: Английский
Citations
0
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163834 - 163834
Published: May 1, 2025
Language: Английский
Citations
0