Flexible and multifunctional triboelectric nanogenerator based on liquid metal/polyvinyl alcohol hydrogel for energy harvesting and self-powered wearable human–machine interaction

Rare Metals, Год журнала: 2023, Номер 43(3), С. 1186 - 1196

Опубликована: Дек. 16, 2023

Язык: Английский

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Flexible Carbon Nanotubes/Polystyrene Membranous Composites Toward Ultraweakly and Frequency-Stable Negative Permittivity at kHz Region

Engineered Science, Год журнала: 2023, Номер unknown

Опубликована: Янв. 1, 2023

Negative permittivity (ε′ < 0) has been a vital and eye-catching electromagnetic parameter for designing new-generation electrical devices.However, ε′-negative materials generally suffer from the overhigh absolute value of ε′ serious frequency dispersion, especially in radio-frequency region.Hence, carbon nanotubes/polystyrene (CNTs/PS) membranous composites were ingeniously designed fabricated by spin-coating procedure.The ultraweakly frequency-stable negative (ɛ′ ~ -200) was amazingly achieved over 10 kHz-1 MHz region, attributing to weakly low-frequency plasmonic state within 3-dimensional (3D) CNTs network.With increased content, hopping conduction behavior evolved metal-like conduction.The impedance analysis based on equivalent circuit models confirmed inductive characteristic materials.The obtained flexible CNTs/PS could significantly enrich their application novel wearable devices.

Язык: Английский

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Flexible Piezoelectric Nanogenerator Based on Cellulose Nanofibril/MXene Composite Aerogels for Low-Frequency Energy Harvesting

ACS Applied Nano Materials, Год журнала: 2023, Номер 6(10), С. 9021 - 9031

Опубликована: Май 11, 2023

Cellulose is emerging as a green and sustainable material in piezoelectric nanogenerators (PENGs) for ambient energy harvesting, although its relatively low coefficient still remains challenge, hindering the potential applications. In this report, flexible PENG with considerable conversion capacity was fabricated by using polydimethylsilane (PDMS)-encapsulated cellulose nanofibril (CNF)/Ti3C2Tx (MXene) composite aerogel film, which capable of collecting low-frequency such from human activities. The use two-dimensional MXene nanosheets not only optimizes structural regularity CNF network but also induces local polarization locking to align cellulosic dipoles. This strategy essentially improved property cellulose, avoiding conventional consuming method (i.e., electrical poling) strengthen piezoelectricity. Moreover, thin layer PDMS endows good mechanical stability flexibility; meanwhile, it prevents oxidizing so maintain activity. optimized CNF/MXene-PENG containing 10 wt % generates dramatically voltage 30.8 V current 0.49 μA. work provides an easy effective pathway access materials enhanced piezoelectricity, aiming approach flexible, green, low-cost PENGs new-generation electronics.

Язык: Английский

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Outstanding Synergy of Sensitivity and Linear Range Enabled by Multigradient Architectures

Nano Letters, Год журнала: 2023, Номер 23(24), С. 11958 - 11967

Опубликована: Дек. 13, 2023

Flexible pressure sensors are devices that mimic the sensory capabilities of natural human skin and enable robots to perceive external stimuli. One main challenges is maintaining high sensitivity over a broad linear range due poor structural compressibility. Here, we report flexible sensor with an ultrahigh 153.3 kPa–1 response unprecedentedly from 0.0005 1300 kPa based on interdigital-shaped, multigradient architectures, featuring modulus, conductivity, microstructure gradients. Such architectures interdigital-shaped configurations effective stress transfer conductivity regulation, evading sensitivity–linear trade-off dilemma. Together resolution, frequency response, good reproducibility ultrabroad range, proof-of-concept applications such as acoustic wave detection, high-resolution measurement, healthcare monitoring in diverse scenarios demonstrated.

Язык: Английский

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Adhesive-free PDMS/PUA bilayer using selective photopolymerization for transparent, attachable, and wearable triboelectric nanogenerator

Nano Energy, Год журнала: 2024, Номер 121, С. 109274 - 109274

Опубликована: Янв. 10, 2024

Язык: Английский

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Recent Advances in Wearable Healthcare Devices: From Material to Application

Bioengineering, Год журнала: 2024, Номер 11(4), С. 358 - 358

Опубликована: Апрель 6, 2024

In recent years, the proliferation of wearable healthcare devices has marked a revolutionary shift in personal health monitoring and management paradigm. These devices, ranging from fitness trackers to advanced biosensors, have not only made more accessible, but also transformed way individuals engage with their data. By continuously signs, physical-based biochemical-based such as heart rate blood glucose levels, technology offers insights into human health, enabling proactive rather than reactive approach healthcare. This towards personalized empowers knowledge tools make informed decisions about lifestyle medical care, potentially leading earlier detection issues tailored treatment plans. review presents fabrication methods flexible applications care. The potential challenges future prospectives are discussed.

Язык: Английский

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Recent development of flexible force sensors with multiple environmental adaptations

Nano Energy, Год журнала: 2024, Номер 124, С. 109443 - 109443

Опубликована: Март 5, 2024

Язык: Английский

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A direct electrochemical biosensor for rapid glucose detection based on nitrogen-doped carbon nanocages

Rare Metals, Год журнала: 2024, Номер 43(5), С. 2184 - 2192

Опубликована: Фев. 8, 2024

Язык: Английский

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Textile Triboelectric Nanogenerator: Future Smart Wearable Energy‐Integration Technology

Advanced Materials Technologies, Год журнала: 2024, Номер 9(21)

Опубликована: Март 8, 2024

Abstract Triboelectric nanogenerator (TENG) technology based on the coupling of triboelectric effect and electrostatic induction has shown great potential in energy‐integration field. In recent years, emerging textile nanogenerators (t‐TENGs) enabled rapid development wearable technologies. The efficient mechanical energy harvesting self‐powered sensing capabilities TENGs advantages textiles can be combined to create t‐TENGs for construction smart fabrics. Herein, a comprehensive review is presented. This begins from working mechanism conventional TENGs, after which layers with fibers, yarns, fabrics discussed. Then, different modes derived critical features power management strategies are Finally, this ends description progress typical applications t‐TENGs. light weight, low cost, flexibility, stretchability, washability, diverse material options, excellent electrical performance will make choice energy‐integrated devices future.

Язык: Английский

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A Wind Bell Inspired Triboelectric Nanogenerator for Extremely Low‑Speed and Omnidirectional Wind Energy Harvesting

Small Methods, Год журнала: 2024, Номер unknown

Опубликована: Март 27, 2024

Abstract As one of the most promising renewable energies, wind energy is abundant in natural environment. However, it still challenging to effectively collect because its variable speed and unpredictable direction. Here, a triboelectric nanogenerator, which inspired by ancient Chinese bells, has been developed from variable‐speed multi‐directional wind. The wind‐bell‐inspired nanogenerator (W‐TENG) capability generate electricity even at very low 0.5 m s −1 . Furthermore, able harvest all directions (0–360 degrees). parameter‐optimized W‐TENG achieves maximum output voltage 9.3 V current 0.63 µA. Electronic devices including digital watch 40 light‐emitting diodes (LEDs) are successfully powered designed W‐TENG, demonstrating applicability. In this study, believed that novel effective strategy provided

Язык: Английский

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