On the origin of contact-electrification

@article{Wang2019OnTO,
  title={On the origin of contact-electrification},
  author={Zhong Lin Wang and Aurelia Chi Wang},
  journal={Materials Today},
  year={2019}
}
Understanding Contact Electrification at Water/Polymer Interface
Contact electrification (CE) involves a complex interplay of physical interactions in realistic material systems. For this reason, scientific consensus on the qualitative and quantitative importance
Unraveling Temperature‐Dependent Contact Electrification between Sliding‐Mode Triboelectric Pairs
The underlying mechanism on contact electrification (CE) has remained a topic of debate over centuries, and it is argued to be due to electron transfer, ion transfer, and/or even material species
Probing Contact‐Electrification‐Induced Electron and Ion Transfers at a Liquid–Solid Interface
TLDR
It is demonstrated that electron transfer plays the dominant role during CE between liquids and solids, which directly impacts the traditional understanding of the formation of an electric double layer at a liquid-solid interface in physical chemistry.
Research_9861463 1..10
Contact electrification (CE) involves a complex interplay of physical interactions in realistic material systems. For this reason, scientific consensus on the qualitative and quantitative importance
Probing Contact Electrification: A Cohesively Sticky Problem.
TLDR
This discussion clearly shows that material transfer must be accounted for when discussing the source of charge generated by polymeric mechanical energy harvesters, and a correlated physical property to understand the triboelectric series is provided.
Electron Transfer as a Liquid Droplet Contacting a Polymer Surface.
TLDR
This work proposes a model for the charge distribution at the liquid-solid interface, named Wang's hybrid layer, which involves the electron transfer, the ionization reaction, and the van der Waals force and proves that TENG is a probe for investigating charge transfer at interface of all phases.
Effects of Surface Functional Groups on Electron Transfer at Liquid-Solid Interfacial Contact Electrification.
TLDR
The discoveries in this work support the "two-step" model about the formation of an electric double-layer (Wang model), in which the electron transfer occurs first when the liquids contact the solids for the very first time.
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On the Electron‐Transfer Mechanism in the Contact‐Electrification Effect
TLDR
A new method is reported to quantitatively investigate real-time charge transfer in CE via triboelectric nanogenerator as a function of temperature, which reveals that electron transfer is the dominant process for CE between two inorganic solids.
Electron Transfer in Nanoscale Contact Electrification: Photon Excitation Effect
TLDR
The results suggest that there exists a threshold photon energy for releasing the triboelectric charges from the surface, which is 4.1 eV, and a photoelectron emission model is proposed to describe light-induced charge decay on a dielectric surface.
Contact-Electrification between Two Identical Materials: Curvature Effect.
TLDR
By preparing a contact-separation mode triboelectric nanogenerator using two pieces of an identical material, the direction of charge transfer during contact-electrification is studied regarding its dependence on curvatures of the sample surfaces, and a curvature-dependent charge transfer model is proposed by introducing curvatures-induced energy shifts of the surface states.
Effect of contact- and sliding-mode electrification on nanoscale charge transfer for energy harvesting
The process of charge transfer based on triboelectrification (TE) and contact electrification (CE) has been recently utilized as the basis for a new and promising energy harvesting technology, i.e.,
Raising the Working Temperature of a Triboelectric Nanogenerator by Quenching Down Electron Thermionic Emission in Contact‐Electrification
TLDR
By designing and preparing a rotating free-standing mode Ti/SiO2 TENG, the relationship between CE and temperature is revealed and it is found that the dominant deterring factor of CE at high temperatures is the electron thermionic emission.
Manipulating nanoscale contact electrification by an applied electric field.
TLDR
The modulation effect of the electric field on contact electrification is enhanced for a thinner dielectric layer and can potentially be utilized to enhance the output performance of energy harvesting devices or nullify contact electric charge transfer in applications where this effect is undesirable.
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