Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media
Grosjean GM, Waitukaitis SR. 2023. Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media. Physical Review Letters. 130(9), 098202.
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Abstract
Models for same-material contact electrification in granular media often rely on a local charge-driving parameter whose spatial variations lead to a stochastic origin for charge exchange. Measuring the charge transfer from individual granular spheres after contacts with substrates of the same material, we find instead a “global” charging behavior, coherent over the sample’s whole surface. Cleaning and baking samples fully resets charging magnitude and direction, which indicates the underlying global parameter is not intrinsic to the material, but acquired from its history. Charging behavior is randomly and irreversibly affected by changes in relative humidity, hinting at a mechanism where adsorbates, in particular, water, are fundamental to the charge-transfer process.
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Date Published
2023-03-03
Journal Title
Physical Review Letters
Publisher
American Physical Society
Acknowledgement
We would like to thank Troy Shinbrot, Victor Lee and Daniele Foresti for helpful discussions. This project has received funding from the European Research Council Grant Agreement No. 949120 and from the the Marie Sk lodowska-Curie Grant Agreement No. 754411 under
the European Union’s Horizon 2020 research and innovation program.
Volume
130
Issue
9
Article Number
098202
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eISSN
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Grosjean GM, Waitukaitis SR. Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media. Physical Review Letters. 2023;130(9). doi:10.1103/physrevlett.130.098202
Grosjean, G. M., & Waitukaitis, S. R. (2023). Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.130.098202
Grosjean, Galien M, and Scott R Waitukaitis. “Single-Collision Statistics Reveal a Global Mechanism Driven by Sample History for Contact Electrification in Granular Media.” Physical Review Letters. American Physical Society, 2023. https://doi.org/10.1103/physrevlett.130.098202.
G. M. Grosjean and S. R. Waitukaitis, “Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media,” Physical Review Letters, vol. 130, no. 9. American Physical Society, 2023.
Grosjean GM, Waitukaitis SR. 2023. Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media. Physical Review Letters. 130(9), 098202.
Grosjean, Galien M., and Scott R. Waitukaitis. “Single-Collision Statistics Reveal a Global Mechanism Driven by Sample History for Contact Electrification in Granular Media.” Physical Review Letters, vol. 130, no. 9, 098202, American Physical Society, 2023, doi:10.1103/physrevlett.130.098202.
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