The electron transfer mechanism between metal and silicon oxide composites for triboelectric nanogenerators

Jia, Baonan; Lei, Ming; Zou, Yuanyuan; Qin, Guoying; Zhang, Chunfang; Han, Lihong; Zhang, Qi; Lu, Pengfei

doi:10.1007/s42114-022-00561-9

Cited by 16 publications

(4 citation statements)

References 49 publications

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“…The periodic boundary condition is applied to the contact model and the vacuum layer thickness along the z-direction is more than 20 Å to block the periodic interactions in this direction. Figures 1(a It is worth discussing that there are two possible terminated atoms on the silica surface: Si and hydroxylated Si-OH [34][35][36][37]. The silica terminated with hydroxylated silicon shows electron-draw ability compared to copper as demonstrated in the previous works [20].…”

Section: Computational and Theoretical Detailsmentioning

confidence: 74%

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Effect of external electric field on copper/silica contact electrification and adhesion: insight from first-principles and molecular mechanics investigations

Wu,

Cao,

et al. 2024

J. Phys. D: Appl. Phys.

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The electrostatic force induced by charge transfer during contact electrification is one of the main components of adhesion force at the solid interface. Some studies found that the magnitude of charge transfer and the consequently electrostatic force can be tuned by the external electric field. However, the detailed mechanism is still lacking in understanding. In this study, the effect of external electric field on copper/silica contact electrification and adhesion is studied via first-principles and molecular mechanics calculations and the mechanism is revealed by electrostatic potential and adhesion energy analysis. It is proved that the external electric field can affect the contact potential difference, which is the driving force of contact electrification, thus influencing the magnitude of charge transfer and electrostatic force. When the electric field direction is the same as the electron transfer direction, the contact electrification can be suppressed, leading to the decrease in the ratio of electrostatic force to van der Waals force. In particularly, the contact electrification and electrostatic force can be completely eliminated when applying a specific electric field intensity. This can provide an inspiration for quantitatively studying the source of adhesion force at solid interface.

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Section: Computational and Theoretical Detailsmentioning

confidence: 74%

“…According to the previous works, Antony et al [20] included the van der Waals correction method in the silica system in the first-principles calculations and others [34,36] did not include it. In the present work, the van der Waals correction method is not included in the first-principles calculations.…”

Section: Computational and Theoretical Detailsmentioning

confidence: 99%

Effect of external electric field on copper/silica contact electrification and adhesion: insight from first-principles and molecular mechanics investigations

Wu,

Cao,

et al. 2024

J. Phys. D: Appl. Phys.

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“…The charge rearrangement is enhanced with the formation of an interface between the GO and ZnO in the PVA/SA matrix. [ 53 ] In the same way, the G‐ZnO nanoparticles of the ultra‐high specific surface area create numerous electron‐flowing channels during the triboelectric power generation process.…”

Section: Resultsmentioning

confidence: 99%

A Facile Approach to Develop Polyvinyl Alcohol‐Based Bio‐Triboelectric Nanogenerator Containing Graphene‐ Doped Zinc Oxide Quantum Dots

Yempally,

Cabibihan,

Ponnamma

2024

Energy Tech

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This article presents an environmentally friendly, low‐cost polymer nanocomposite, polyvinyl alcohol/sodium alginate‐graphene‐zinc oxide (PVA‐SA/G‐ZnO) based triboelectric nanogenerator by spin coating. ZnO quantum dots of average particle size <10 nm and the graphene oxide (GO)‐doped ZnO are synthesized by co‐precipitation following ageing. ZnO and G‐ZnO particles are filled into the PVA/SA blend system using the solution mixing method. Spin‐coated films of ≈1.2 μm and casted films of 120 μm thicknesses were used to prepare triboelectric nanogenerators (TENGs) to test the output voltage performances. Irrespective of the thickness values, the films gave similar voltage responses with contact electrification. This illustrates triboelectric power generation as a surface charge carrier phenomenon based on morphological analyses by scanning electron microscope (SEM) and atomic force microscopy (AFM). The maximum output voltage of 0.24 V was approximately 5 times higher for the PVA/SA composite containing 2 wt% G‐ZnO nanomaterials compared to the neat polymer are obtained. The nanocomposites also demonstrate excellent dielectric constant (22 times higher) values, suggesting the role of the biodegradable thin‐film TENGs in various self‐powering devices.

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“…[ 34 ] Jia et al used first‐principles computing to investigate the mechanism of electron transfer for triboelectric nanogenerators between metal and silicon oxide composites. [ 35 ] Jiang et al reviewed TENG technological advancements and their uses in biomedicine, the Internet of Things, autonomous sensors, and blue energy. [ 36 ] Lu et al proposed the combination of a visual light source and a high‐output TENG as a freely constructible self‐powered visual tactile sensor.…”

Section: Introductionmentioning

confidence: 99%

A Self‐Powered Smart White Cane for Improving Mobility of Visually Impaired Person Using a Triboelectric Nanogenerator

Song,

Panda,

Hajra

et al. 2024

Energy Tech

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The present research offers an innovative approach to enhance the safety and mobility of people with visual impairments by using a smart white cane sensor. Herein, an aluminum electrode, Kapton film, and an inexpensive PET substrate are employed to develop an origami‐shaped multilayered triboelectric nanogenerator (TENG) device. The multilayered integration of three‐unit TENGs produces output with a high power of 51 μW at 50 MΩ, along with 155 V and 4.5 μA. Capacitor charging, low‐power electronics powering, and the integration of mechanoluminescent materials are demonstrated. The integration of mechanoluminescent materials enables efficient identification of visually impaired people in regions with poor lighting. A single‐electrode TENG is also implemented for successful surface material detection. To further enhance the sensor's capabilities, digital signal processing techniques are employed for obstacle recognition on their route. The intelligent white cane sensor effectively detects obstructions, offering the user instantaneous feedback and enabling more secure navigation in sophisticated environments. This study highlights the possibility of integrating TENG technologies to provide a complete solution for people with visual impairments. The smart white cane sensor has the potential to greatly increase the safety and independence of visually impaired people in a variety of outdoor and public spaces.

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The electron transfer mechanism between metal and silicon oxide composites for triboelectric nanogenerators

Cited by 16 publications

References 49 publications

Effect of external electric field on copper/silica contact electrification and adhesion: insight from first-principles and molecular mechanics investigations

Effect of external electric field on copper/silica contact electrification and adhesion: insight from first-principles and molecular mechanics investigations

A Facile Approach to Develop Polyvinyl Alcohol‐Based Bio‐Triboelectric Nanogenerator Containing Graphene‐ Doped Zinc Oxide Quantum Dots

A Self‐Powered Smart White Cane for Improving Mobility of Visually Impaired Person Using a Triboelectric Nanogenerator

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