Tribo-electric charging of dielectric solids of identical composition

Angus, John C.; Greber, Isaac

doi:10.1063/1.5024742

Cited by 16 publications

(8 citation statements)

References 44 publications

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“…In the history of studying the CE, most works focused on solid–solid cases, and the liquid–solid CE was not concerned. − Therefore, the mechanism of liquid–solid CE is more mysterious than that of solid–solid CE. In the 1980s, El-Kazzaz and Rose-Innes et al investigated the CE between liquid metals and solid insulators, which is one of the early works about the liquid–solid CE .…”

Section: Brief History About Studying Liquid–solid Cementioning

confidence: 99%

Contact Electrification at the Liquid–Solid Interface

2021

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Interfaces between a liquid and a solid (L–S) are the most important surface science in chemistry, catalysis, energy, and even biology. Formation of an electric double layer (EDL) at the L–S interface has been attributed due to the adsorption of a layer of ions at the solid surface, which causes the ions in the liquid to redistribute. Although the existence of a layer of charges on a solid surface is always assumed, the origin of the charges is not extensively explored. Recent studies of contact electrification (CE) between a liquid and a solid suggest that electron transfer plays a dominant role at the initial stage for forming the charge layer at the L–S interface. Here, we review the recent works about electron transfer in liquid–solid CE, including scenerios such as liquid–insulator, liquid–semiconductor, and liquid–metal. Formation of the EDL is revisited considering the existence of electron transfer at the L–S interface. Furthermore, the triboelectric nanogenerator (TENG) technique based on the liquid–solid CE is introduced, which can be used not only for harvesting mechanical energy from a liquid but also as a probe for probing the charge transfer at liquid–solid interfaces.

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Section: Brief History About Studying Liquid–solid Cementioning

confidence: 99%

Contact Electrification at the Liquid–Solid Interface

2021

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“…[6] When the insulator is involved, the electron trapped in the surface states of insulator which can be excited into a conducting state is considered as the charge carriers. [7][8][9][10] But some experiments also pointed out that the number of electrons in surface traps is insufficient to support the observed contact charging. [11] And an opposing opinion is also widespread, which suggest that the CE involving insulator is caused by the transfer of mobile ions adsorbing on insulator surfaces [12] or dissolving in the surface water layer.…”

Section: Doi: 101002/adma201808197mentioning

confidence: 99%

Electron Transfer in Nanoscale Contact Electrification: Effect of Temperature in the Metal–Dielectric Case

et al. 2019

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The phenomenon of contact electrification (CE) has been known for thousands of years, but the nature of the charge carriers and their transfer mechanisms are still under debate. Here, the CE and triboelectric charging process are studied for a metal–dielectric case at different thermal conditions by using atomic force microscopy and Kelvin probe force microscopy. The charge transfer process at the nanoscale is found to follow the modified thermionic‐emission model. In particular, the focus here is on the effect of a temperature difference between two contacting materials on the CE. It is revealed that hotter solids tend to receive positive triboelectric charges, while cooler solids tend to be negatively charged, which suggests that the temperature‐difference‐induced charge transfer can be attributed to the thermionic‐emission effect, in which the electrons are thermally excited and transfer from a hotter surface to a cooler one. Further, a thermionic‐emission band‐structure model is proposed to describe the electron transfer between two solids at different temperatures. The findings also suggest that CE can occur between two identical materials owing to the existence of a local temperature difference arising from the nanoscale rubbing of surfaces with different curvatures/roughness.

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“…In the display production process, statistic electricity between a metal stage and the glasses destroys electric parts or wiring of the display, leading a low production yield. 5,6 While the static electricity can be suppressed by letting the surface be rough, 3,[7][8][9][10] the surface roughness equivalent to light wavelength impairs © 2022 The American Ceramic Society and Wiley Periodicals LLC.…”

Section: Introductionmentioning

confidence: 99%

Glass etching with gaseous hydrogen fluoride: Rapid management of surface nano‐roughness

Hayashi¹,

Urashima

Yui

2022

Int J of Appl Glass Sci

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Surface roughness of glass is desired to be arbitrary controlled because it affects a variety of properties such as tactile impression, optical properties, and contact chargeability. While the surface modification is currently achieved by wet etching of the glasses with hydrofluoric acid, there is still room for improvement because the wet etching cannot be simultaneously applied during flat glass production. We recently developed novel etching scheme, which uses gaseous hydrogen fluoride (HF) under high temperature. Because the flat glasses are kept hot during the production, our procedure can be introduced to the flat glass production process. Here, we demonstrate that surface nano-roughness (1-20 nm of arithmetic mean roughness) of silicate glasses can be rapidly and reproducibly controlled by our method with changing the reaction temperature. It was found that the reaction with gaseous HF heterogeneously left metal fluorides on the glasses and that the fluorides partially masked the further reaction. High reaction temperature led the fluoride particles larger, resulting in rougher surface after removing the fluoride layer. It took only a few seconds for this reaction.

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Tribo-electric charging of dielectric solids of identical composition

Cited by 16 publications

References 44 publications

Contact Electrification at the Liquid–Solid Interface

Contact Electrification at the Liquid–Solid Interface

Electron Transfer in Nanoscale Contact Electrification: Effect of Temperature in the Metal–Dielectric Case

Glass etching with gaseous hydrogen fluoride: Rapid management of surface nano‐roughness

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