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Open AccessArticle

Dipolophoresis and Travelling-Wave Dipolophoresis of Metal Microparticles

1
Facultad de Ciencias de la Electrónica, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y 18 Sur, San Manuel, CU. FCE2, Puebla 72570, Mexico
2
Departamento de Electrónica y Electromagnetismo, Facultad de Física, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(3), 259; https://doi.org/10.3390/mi11030259
Received: 6 February 2020 / Revised: 26 February 2020 / Accepted: 27 February 2020 / Published: 28 February 2020
(This article belongs to the Special Issue 10th Anniversary of Micromachines)
We study theoretically and numerically the electrokinetic behavior of metal microparticles immersed in aqueous electrolytes. We consider small particles subjected to non-homogeneous ac electric fields and we describe their motion as arising from the combination of electrical forces (dielectrophoresis) and the electroosmotic flows on the particle surface (induced-charge electrophoresis). The net particle motion is known as dipolophoresis. We also study the particle motion induced by travelling electric fields. We find analytical expressions for the dielectrophoresis and induced-charge electrophoresis of metal spheres and we compare them with numerical solutions. This validates our numerical method, which we also use to study the dipolophoresis of metal cylinders. View Full-Text
Keywords: electrokinetics; dipolophoresis; dielectrophoresis; induced-charge electrophoresis; nanowires electrokinetics; dipolophoresis; dielectrophoresis; induced-charge electrophoresis; nanowires
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MDPI and ACS Style

Flores-Mena, J.E.; García-Sánchez, P.; Ramos, A. Dipolophoresis and Travelling-Wave Dipolophoresis of Metal Microparticles. Micromachines 2020, 11, 259.

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