Electric Forces

Brutin, David; Vancauwenberghe, Valérie; Marco, Paolo Di

doi:10.1016/b978-0-12-800722-8.00027-8

Cited by 3 publications

(2 citation statements)

References 53 publications

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“…[ 12 ] Typically, surface charge generated by CE at the solid–liquid interface are often given less attention compared to the effect produced by strong external physical fields. [ 13 ] Recent research has shown that these surface charge influence how droplets move on surfaces and the control of droplet motion. [ 14 ] The movement of droplets across a charged film results in a decrease in the contact angle as the sliding distance increases, suggesting that dynamic wetting is influenced by surface charge.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous Wetting Induced by Contact‐Electrification at Liquid–Solid Interface

Tang,

Yang,

Guo

et al. 2024

Advanced Materials

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Wettability significantly influences various surface interactions and applications at the liquid‐solid interface. However, our understanding is complicated by the intricate charge exchange occurring through contact electrification (CE) during this process. The understanding of the influence of triboelectric charge on wettability remains challenging, especially due to the complexities involved in concurrently measuring contact angles and interfacial electrical signals. Here, we investigate the relationship between surface charge density and change of contact angle of dielectric films after contact with water droplets. We observe that the charge exchange when water spared lead to a spontaneous wetting phenomenon, which is termed as the contact electrification induced wetting (CEW). Notably, our results demonstrate a linear dependence between the change of contact angle (CA) of the materials and the density of surface charge on the solid surface. Continuous CEW tests show that not only the static CA but also the dynamics of wetting are influenced by the accumulation charges at the interface. The mechanism behind CEW involves the redistribution of surface charges on a solid surface and dipolar water molecules within liquid. This interaction results in a decrease in interface energy, leading to a reduction in the CA. Ab initio calculations suggest that the reduction in interface energy may stem from the enhanced surface charge on the substrate, which strengthens the hydrogen bond interaction between water and the substrate. These findings have the potential to advance our understanding of CE and wetting phenomena, with applications in energy harvesting, catalysis, and droplet manipulation at liquid‐solid interfaces.This article is protected by copyright. All rights reserved

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Section: Introductionmentioning

confidence: 99%

Spontaneous Wetting Induced by Contact‐Electrification at Liquid–Solid Interface

Tang,

Yang,

Guo

et al. 2024

Advanced Materials

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“…Therefore, understanding the mechanism that lies behind discharge inception from a water droplet is of vital importance. Even though a broad range of studies has focused on the deformation of droplets in electric fields before ,,− and after − surface instability occurs, only a limited number of works have investigated the correlation between this deformation and discharge inception. , To the best of our knowledge, the effect of different surface wettabilities , and respective drop deformation on discharge onset has not been explored for dc fields perpendicular to the surface in a combined computational and experimental study. Here, we report that surface wettability has a direct effect on the droplet deformation in an electric field as well as on the discharge inception.…”

Section: Introductionmentioning

confidence: 99%

Influence of Surface Wettability on Discharges from Water Drops in Electric Fields

et al. 2019

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It is known that electrified droplets deform and may become unstable when the electric field they are exposed to reaches a certain critical value. These instabilities are accompanied by electric discharges due to the local enhancement of the electric field caused by the deformed droplets.Here we report and highlight an interesting aspect of the behavior of unstable water droplets and discharge generation: by implementing wettability engineering, we can manipulate these discharges. We demonstrate that wettability strongly influences the shape of a droplet that is exposed to an electric field. The difference in shape is directly related to differences in the critical value of the applied electric field at which inception of discharge occurs. Using theoretical models, we can predict and sufficiently support our observations. Thus, by tailoring the wettability of the surface, we can control droplet's behavior from expediting the discharge inception to completely restricting it.

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Evaporation of Sessile Droplets

Wilson

D’Ambrosio

2023

Annu. Rev. Fluid Mech.

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The evaporation of a sessile droplet of liquid is a complex and multifaceted fundamental topic of enduring scientific interest that is key to numerous physical and biological processes. As a result, in recent decades a considerable multidisciplinary research effort has been directed toward many different aspects of the problem. This review focuses on some of the insights that can be obtained from relatively simple mathematical models and discusses some of the directions in which the field may move in the future. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 55 is January 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Electric Forces

Cited by 3 publications

References 53 publications

Spontaneous Wetting Induced by Contact‐Electrification at Liquid–Solid Interface

Spontaneous Wetting Induced by Contact‐Electrification at Liquid–Solid Interface

Influence of Surface Wettability on Discharges from Water Drops in Electric Fields

Evaporation of Sessile Droplets

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