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arXiv:2408.16083cond-mat.mtrl-sci

A Quantitative Model of Triboelectric Charge Transfer

Karl P. Olson, Laurence D. Marks

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Abstract

Triboelectricity, when rubbing or contacting materials causes electric charge transfer, is ubiquitous across many fields, and has been studied in detail for centuries. Despite this, a complete description of triboelectricity remains elusive. Here, we analyze the contact between a metal asperity and a semiconductor, including contributions from the depletion zone of the semiconductor and from flexoelectric polarization that arises due to the strain gradients at asperity contacts. The free charges involved in charge transfer are then discussed and calculated. As a result, we develop a quantitative model for triboelectric charge transfer that details how charge transfer scales with contact parameters, the relative influence of depletion and flexoelectricity, and which agrees with various trends in multiple classes of triboelectric experiments.

arXiv comments
Journal reference
DOI
doi:10.26599/FRICT.2025.9440937
Subjects
cond-mat.mtrl-sciMaterials Science

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Linked by 1 identifiable commenter in 2 comments across 2 threads, from Sep 2024 to Sep 2024.

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Discussed in comments2 threads

  1. Groundbreaking Study Reveals How Rubbing Generates Static Electricity 1 comment

    • ldr: Shear forces set up a nano-scale front/back electric potential difference. Arxiv: [1] ACS Nanolett paper: [2] [1] https://arxiv.org/pdf/2408.16083 [2] https://pubs.acs.org/doi/10.1021/acs.nanolett.4c03656

      mgsouthView on HNParent context

  2. [Dupe] What Puts the "Tribo" in Triboelectricity? 1 comment

    • tldr: Shear forces set up a nano-scale front/back electric potential difference. Arxiv: [1] SciTechDaily summary: [2] And a shout-out to DI, where I saw the first link [3] Edit: Dupe [0] [0] https://news.ycombinator.com/item?id=41603387 [1] https://arxiv.org/pdf/2408.16083 [2]…

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