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Travelling-Wave Dipolophoresis: Levitation and Electrorotation of Janus Nanoparticles
We present a theoretical study of the hydrodynamic and electrokinetic response of both metallic spherical polarized colloids as well as metallodielectic Janus particles, which are subjected to an arbitrary non-uniform ambient electric field (DC or AC forcing). The analysis is based on employing the...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7910911/ https://www.ncbi.nlm.nih.gov/pubmed/33499203 http://dx.doi.org/10.3390/mi12020114 |
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author | Miloh, Touvia Nagler, Jacob |
author_facet | Miloh, Touvia Nagler, Jacob |
author_sort | Miloh, Touvia |
collection | PubMed |
description | We present a theoretical study of the hydrodynamic and electrokinetic response of both metallic spherical polarized colloids as well as metallodielectic Janus particles, which are subjected to an arbitrary non-uniform ambient electric field (DC or AC forcing). The analysis is based on employing the linearized ‘standard’ model (Poisson–Nernst–Planck formulation) and on the assumptions of a ‘weak’ field and small Debye scale. In particular, we consider cases of linear and helical time-harmonic travelling-wave excitations and provide explicit expressions for the resulting dielectrophoretic and induced-charge electrophoretic forces and moments, exerted on freely suspended particles. The new analytic expressions thus derived for the linear and angular velocities of the initially uncharged polarizable particle are compared against some available solutions. We also analyze the levitation problem (including stability) of metallic and Janus particles placed in a cylindrical (insulating or conducting) pore near a powered electrode. |
format | Online Article Text |
id | pubmed-7910911 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-79109112021-02-28 Travelling-Wave Dipolophoresis: Levitation and Electrorotation of Janus Nanoparticles Miloh, Touvia Nagler, Jacob Micromachines (Basel) Article We present a theoretical study of the hydrodynamic and electrokinetic response of both metallic spherical polarized colloids as well as metallodielectic Janus particles, which are subjected to an arbitrary non-uniform ambient electric field (DC or AC forcing). The analysis is based on employing the linearized ‘standard’ model (Poisson–Nernst–Planck formulation) and on the assumptions of a ‘weak’ field and small Debye scale. In particular, we consider cases of linear and helical time-harmonic travelling-wave excitations and provide explicit expressions for the resulting dielectrophoretic and induced-charge electrophoretic forces and moments, exerted on freely suspended particles. The new analytic expressions thus derived for the linear and angular velocities of the initially uncharged polarizable particle are compared against some available solutions. We also analyze the levitation problem (including stability) of metallic and Janus particles placed in a cylindrical (insulating or conducting) pore near a powered electrode. MDPI 2021-01-22 /pmc/articles/PMC7910911/ /pubmed/33499203 http://dx.doi.org/10.3390/mi12020114 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Miloh, Touvia Nagler, Jacob Travelling-Wave Dipolophoresis: Levitation and Electrorotation of Janus Nanoparticles |
title | Travelling-Wave Dipolophoresis: Levitation and Electrorotation of Janus Nanoparticles |
title_full | Travelling-Wave Dipolophoresis: Levitation and Electrorotation of Janus Nanoparticles |
title_fullStr | Travelling-Wave Dipolophoresis: Levitation and Electrorotation of Janus Nanoparticles |
title_full_unstemmed | Travelling-Wave Dipolophoresis: Levitation and Electrorotation of Janus Nanoparticles |
title_short | Travelling-Wave Dipolophoresis: Levitation and Electrorotation of Janus Nanoparticles |
title_sort | travelling-wave dipolophoresis: levitation and electrorotation of janus nanoparticles |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7910911/ https://www.ncbi.nlm.nih.gov/pubmed/33499203 http://dx.doi.org/10.3390/mi12020114 |
work_keys_str_mv | AT milohtouvia travellingwavedipolophoresislevitationandelectrorotationofjanusnanoparticles AT naglerjacob travellingwavedipolophoresislevitationandelectrorotationofjanusnanoparticles |