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Kaponig M, Mölleken A, Nienhaus H, et al. Dynamics of contact electrification. Sci Adv. 2021;7(22)doi: 10.1126/sciadv.abg7595.
Kaponig, M., Mölleken, A., Nienhaus, H., & Möller, R. (2021). Dynamics of contact electrification. Science advances, 7(22), . https://doi.org/10.1126/sciadv.abg7595
Kaponig, Mirco, et al. "Dynamics of contact electrification." Science advances vol. 7,22 (2021). doi: https://doi.org/10.1126/sciadv.abg7595
Kaponig M, Mölleken A, Nienhaus H, Möller R. Dynamics of contact electrification. Sci Adv. 2021 May 26;7(22). doi: 10.1126/sciadv.abg7595. Print 2021 May. PMID: 34039611; PMCID: PMC8153716.
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Sci Adv. 2021 May 26;7(22). doi: 10.1126/sciadv.abg7595. Print 2021 May.

Dynamics of contact electrification.

Science advances

Mirco Kaponig, Andre Mölleken, Hermann Nienhaus, Rolf Möller

Affiliations

  1. Faculty of Physics and Center for Nanointegration Duisburg-Essen CENIDE, University of Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany.
  2. Faculty of Physics and Center for Nanointegration Duisburg-Essen CENIDE, University of Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany. [email protected].

PMID: 34039611 PMCID: PMC8153716 DOI: 10.1126/sciadv.abg7595

Abstract

Although the electrical charging of objects brought into contact has been observed for at least 2000 years, the details of the underlying mechanism are still not yet fully understood. The present paper deals with the very basic process of contact electrification between two metals. We have developed an experimental method to follow the charge of a small sphere bouncing on a grounded planar electrode on a time scale down to 1 μs. It reveals that the sphere is discharged in the moment of contact, which lasts about 6 to 8 μs. However, at the very moment of disruption of the electrical contact, it regains charge far beyond the expectation according to the contact potential difference. The excess charge rises with increasing contact area.

Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).

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