Quincke Oscillations of Colloids at Planar Electrodes

Zhengyan Zhang; Hang Yuan; Yong Dou; Monica Olvera De La Cruz; Kyle J.M. Bishop

doi:10.1103/PhysRevLett.126.258001

Quincke Oscillations of Colloids at Planar Electrodes

Zhengyan Zhang, Hang Yuan, Yong Dou, Monica Olvera De La Cruz, Kyle J.M. Bishop

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Dielectric particles in weakly conducting fluids rotate spontaneously when subject to strong electric fields. Such Quincke rotation near a plane electrode leads to particle translation that enables physical models of active matter. In this Letter, we show that Quincke rollers can also exhibit oscillatory dynamics, whereby particles move back and forth about a fixed location. We explain how oscillations arise for micron-scale particles commensurate with the thickness of a field-induced boundary layer in the nonpolar electrolyte. This work enables the design of colloidal oscillators.

Original language	English (US)
Article number	258001
Journal	Physical review letters
Volume	126
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.126.258001
State	Published - Jun 25 2021

Funding

This work was supported as part of the Center for Bio-Inspired Energy Science, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award DE-SC0000989.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.126.258001

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abstract = "Dielectric particles in weakly conducting fluids rotate spontaneously when subject to strong electric fields. Such Quincke rotation near a plane electrode leads to particle translation that enables physical models of active matter. In this Letter, we show that Quincke rollers can also exhibit oscillatory dynamics, whereby particles move back and forth about a fixed location. We explain how oscillations arise for micron-scale particles commensurate with the thickness of a field-induced boundary layer in the nonpolar electrolyte. This work enables the design of colloidal oscillators.",

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AB - Dielectric particles in weakly conducting fluids rotate spontaneously when subject to strong electric fields. Such Quincke rotation near a plane electrode leads to particle translation that enables physical models of active matter. In this Letter, we show that Quincke rollers can also exhibit oscillatory dynamics, whereby particles move back and forth about a fixed location. We explain how oscillations arise for micron-scale particles commensurate with the thickness of a field-induced boundary layer in the nonpolar electrolyte. This work enables the design of colloidal oscillators.

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Quincke Oscillations of Colloids at Planar Electrodes

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