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Probing Contact‐Electrification‐Induced Electron and Ion Transfers at a Liquid–Solid Interface

Nie, Jinhui, Ren, Zewei, Xu, Liang, Lin, Shiquan, Zhan, Fei, Chen, Xiangyu, Wang, Zhong Lin·2020·Advanced Materials

Abstract

As a well‐known phenomenon, contact electrification (CE) has been studied for decades. Although recent studies have proven that CE between two solids is primarily due to electron transfer, the mechanism for CE between liquid and solid remains controversial. The CE process between different liquids and polytetrafluoroethylene (PTFE) film is systematically studied to clarify the electrification mechanism of the solid–liquid interface. The CE between deionized water and PTFE can produce a surface charges density in the scale of 1 nC cm−2, which is ten times higher than the calculation based on the pure ion‐transfer model. Hence, electron transfer is likely the dominating effect for this liquid–solid electrification process. Meanwhile, as ion concentration increases, the ion adsorption on the PTFE hinders electron transfer and results in the suppression of the transferred charge amount. Furthermore, there is an obvious charge transfer between oil and PTFE, which further confirms the presence of electron transfer between liquid and solid, simply because there are no ions in oil droplets. 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 (EDL) at a liquid–solid interface in physical chemistry.

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Metadata

Authors
Nie, J., Ren, Z., Xu, L., Lin, S., Zhan, F., Chen, X., & Wang, Z. L.
Venue
Advanced Materials
Publisher
Wiley
Published
2019-11-29
Volume
32
Issue
2
Pages
e1905696-e1905696
ISSN
  • 0935-9648 (ISSN-L)
  • 1521-4095
OpenAlex
W2990622042
Cited by
593
References
50
FWCI
18.57
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Probing Contact‐Electrification‐Induced Electron and Ion Transfers at a Liquid–Solid Interface. https://app.cochat.ai/papers/10.1002/adma.201905696
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Nie, J., Ren, Z., Xu, L., Lin, S., Zhan, F., Chen, X., & Wang, Z. L. (2020). Probing Contact‐Electrification‐Induced Electron and Ion Transfers at a Liquid–Solid Interface. Advanced Materials. https://doi.org/10.1002/adma.201905696

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