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Electrokinetic droplet transport from electroosmosis to electrophoresis

Droplet transport in microfluidic channels by electrically induced flows often entails the simultaneous presence of electroosmosis and electrophoresis. Here we make use of coupled lattice-Boltzmann/molecular dynamics simulations to compute the mobility of a droplet in a microchannel under the effect...

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Detalles Bibliográficos
Autores principales: Bazarenko, Andrei, Sega, Marcello
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6289104/
https://www.ncbi.nlm.nih.gov/pubmed/30444235
http://dx.doi.org/10.1039/c8sm01788c
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author Bazarenko, Andrei
Sega, Marcello
author_facet Bazarenko, Andrei
Sega, Marcello
author_sort Bazarenko, Andrei
collection PubMed
description Droplet transport in microfluidic channels by electrically induced flows often entails the simultaneous presence of electroosmosis and electrophoresis. Here we make use of coupled lattice-Boltzmann/molecular dynamics simulations to compute the mobility of a droplet in a microchannel under the effect of an external electric field. By varying the droplet solvation free energy of the counterions released at the channel walls, we observe the continuous transition between the electroosmotic and electrophoretic regime. We show that it is possible to describe the mobility of a droplet in a unified, consistent way, by combining the theoretical description of the electroosmotic flow with, in this case, the Hückel limit of electrophoresis, modified in order to take into account the Hadamard–Rybczynski droplet drag.
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spelling pubmed-62891042019-01-09 Electrokinetic droplet transport from electroosmosis to electrophoresis Bazarenko, Andrei Sega, Marcello Soft Matter Chemistry Droplet transport in microfluidic channels by electrically induced flows often entails the simultaneous presence of electroosmosis and electrophoresis. Here we make use of coupled lattice-Boltzmann/molecular dynamics simulations to compute the mobility of a droplet in a microchannel under the effect of an external electric field. By varying the droplet solvation free energy of the counterions released at the channel walls, we observe the continuous transition between the electroosmotic and electrophoretic regime. We show that it is possible to describe the mobility of a droplet in a unified, consistent way, by combining the theoretical description of the electroosmotic flow with, in this case, the Hückel limit of electrophoresis, modified in order to take into account the Hadamard–Rybczynski droplet drag. Royal Society of Chemistry 2018-12-21 2018-11-16 /pmc/articles/PMC6289104/ /pubmed/30444235 http://dx.doi.org/10.1039/c8sm01788c Text en This journal is © The Royal Society of Chemistry 2018 http://creativecommons.org/licenses/by/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0)
spellingShingle Chemistry
Bazarenko, Andrei
Sega, Marcello
Electrokinetic droplet transport from electroosmosis to electrophoresis
title Electrokinetic droplet transport from electroosmosis to electrophoresis
title_full Electrokinetic droplet transport from electroosmosis to electrophoresis
title_fullStr Electrokinetic droplet transport from electroosmosis to electrophoresis
title_full_unstemmed Electrokinetic droplet transport from electroosmosis to electrophoresis
title_short Electrokinetic droplet transport from electroosmosis to electrophoresis
title_sort electrokinetic droplet transport from electroosmosis to electrophoresis
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6289104/
https://www.ncbi.nlm.nih.gov/pubmed/30444235
http://dx.doi.org/10.1039/c8sm01788c
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