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Review Article | Open Access | Online First

Techniques for surface charge measurements and exploring contact electrification

Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
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Abstract

Contact electrification (CE) is one of the most important physical phenomena within the realm of surface science, with a history spanning over 2,600 years. Although numerous experiments have been conducted to detect CE and theories regarding electron, ion, and material transfer have been proposed, the mechanism of CE remains a subject of ongoing debate and continues to intrigue scientists. A key issue in CE studies is accurately measuring the charge transfer in various situations. The development of charge transfer measurements has consistently led to a deeper understanding of CE. In this review, we explore the field of CEs, focusing on methods for measuring charge transfer. The introduction of six experimental methods from macroscopic to microscopic and first-principles calculations for CE studies aims to promote their proper use and inspire the design of new methods. Moreover, we highlight the shortcomings of the present research approach and provide a perspective on future methodological developments.

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Cite this article:
Lin S, Zhang C, Shao T. Techniques for surface charge measurements and exploring contact electrification. Friction, 2024, https://doi.org/10.26599/FRICT.2025.9440968

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Received: 15 November 2023
Revised: 18 June 2024
Accepted: 24 July 2024
Published: 09 December 2024
© The Author(s) 2025.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).

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