Related references
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Article
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Summary: Contact electrification (or triboelectrification) is a universal phenomenon that occurs between any two materials or two phases of materials. The current output varies when different materials come into contact. The tribovoltaic effect, discovered in recent years, refers to the direct current flowing between the top electrode of a p-type semiconductor and the bottom of an n-type semiconductor when they slide against each other. This effect is caused by the generation of electron-hole pairs at the PN junction, due to the energy released from the formation of new chemical bonds at the interface during mechanical sliding. The tribovoltaic nanogenerator, based on this effect, has potential applications.
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Summary: This study demonstrates a constant-voltage DC-TENG (C-DC-TENG) with robust output performance and improved charge density through the ternary dielectric triboelectrification effect. The optimized C-DC-TENG achieves high output charge density and power density, and maintains 100% output after 800,000 cycles. This research provides a promising technique for large-scale clean energy harvesting.
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Summary: This study achieves the comprehensive integration and synergetic utilization of triboelectrification, electrostatic induction, and electrostatic discharge in a single device, realizing a dual-functional TENG (DF-TENG) to produce an AC/DC convertible output. Unlike conventional TENGs, the coupling of triboelectrification and electrostatic discharge enables charge circulation between the dielectric tribo-layers, while electrostatic induction realizes charge transfer in the external circuit. This research not only provides a paradigm shift to achieve AC/DC convertible output, but it also exhibits high potential for extending the TENG design philosophy.
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Review
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Summary: The seamless integration of triboelectric nanogenerator (TENG) technology with traditional wearable textile materials has resulted in the development of textile TENGs, which will have a significant impact in the era of Internet of Things and artificial intelligence. This article comprehensively summarizes and analyzes the recent advances in textile TENGs with 3D fabric structures, highlighting their superiority over 1D and 2D structures in terms of power output and pressure sensing. The future integration capabilities of 3D fabrics are also discussed.
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Summary: This study provides an overview of wearable pressure sensors for monitoring human pulse waves, focusing on the sensor mechanisms, microengineering structures, and applications in cardiovascular condition assessment. The study also discusses the opportunities and challenges faced by wearable pressure sensors, highlighting their potential as a wearable intelligent system for personalized healthcare.
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Wei Yan et al.
Summary: Inspired by the auditory system, this study introduces a fabric that functions as a sensitive microphone while retaining the traditional qualities of fabrics. The fabric utilizes high-Young's modulus textile yarns and thermally drawn composite piezoelectric fibers to convert tenuous pressure waves at audible frequencies into electrical signals. The results show that nanometer-level vibrational modes in the fabric are responsible for the electrical output of the fibers. Applications of this study include measuring the direction of acoustic impulses, establishing bidirectional communication between fabrics, and auscultating cardiac sound signals.
Article
Multidisciplinary Sciences
Yang Dong et al.
Summary: By leveraging the rheological properties of gas-liquid two-phase flow and the Venturi-like design, a gas-liquid two-phase flow-based triboelectric nanogenerator (GL-TENG) with ultrahigh voltage and volumetric charge density has been developed, showing promising prospects in energy harvesting and sensing applications.
Article
Chemistry, Physical
Wencong He et al.
Summary: In this study, a novel strategy is proposed to capture dissipation charge for enhancing the output performance of sliding TENG. By designing DC output electrodes based on the coupling of triboelectrification and air-breakdown, the device achieves multichannel output and significantly increases the power density.
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Summary: This research developed a soft-contact charge excitation rotary TENG and explored the matching mechanism of different charge excitation strategies. Through studies on capacitor models and theoretical calculations, it was found that the output of the main TENG is mainly affected by capacitors and Zener diodes. The experimental results verified the theoretical findings.
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Summary: This study proposes a novel design strategy for a moist-electric generator by using differently charged electrodes and an electrolyte-loaded nanofiber film. The generator achieved sustained voltage and current output over 120 hours without weakening, while remaining sensitive to moisture in a wide humidity range. This capacitor-inspired generator differs from previous devices in how the ion-diffusion force is generated. It can directly power electronics and has practical applications in respiration monitoring and touch sensing.
ENERGY & ENVIRONMENTAL SCIENCE
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Review
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Qin Zhang et al.
Summary: The internet of things (IoT) has seen rapid progress in recent years, and the triboelectric nanogenerator (TENG) technology based on the triboelectrification effect and electrostatic induction shows great potential in various fields. This review proposes a concept of the TENG-based human body IoT system, which focuses on energy harvesting, sensing, and interfacing. The review provides a comprehensive overview of TENGs in terms of energy harvesting configurations and materials, wearable and implantable sensors for human motion monitoring, and TENG-based human-body interfacing with external electronics. The development trend, suitable materials, and future research directions of TENGs are also discussed.
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Shengnan Cui et al.
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Review
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Hao Wu et al.
Summary: By leveraging the opposite-charge-enhancement effect and transistor-like device design, TENG can overcome the limitations of high output impedance and low charge transfer, achieving instantaneous power density over 10 MW/m(2) at a low frequency of approximately 1 Hz. This breakthrough not only sets a record of high-power output for TENG, but also opens up possibilities for powering commercial lamps and wirelessly supplying vehicle bulbs.
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Zhihao Zhao et al.
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Chuguo Zhang et al.
Summary: An active resonance triboelectric nanogenerator (AR-TENG) system is reported for harvesting water-wave energy efficiently, utilizing simple pendulum, tumbler, and flexible ring TENG to collect omnidirectional and frequency varying water-wave energy through excellent structural design and resonance effect.
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Pengfei Chen et al.
Summary: By utilizing electrode misalignment and circuit connection, a stable direct current multi-phase TENG with high average power output at constant current has been developed, which is capable of lighting up LEDs and driving commercial electronics.
ENERGY & ENVIRONMENTAL SCIENCE
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Summary: Wearable devices are gaining increasing attention for their potential to transform the digital world. This paper reviews cutting-edge power generation methodologies for wearables, discusses key factors such as sensor types and materials, and outlines future directions in wearable technology development.
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