Insulating traveling-wave electrophoresis
Insulating traveling-wave electrophoresis
Traveling-wave electrophoresis (TWE) is a method for transporting charged colloidal particles used in many microfluidic techniques for particle manipulation and fractionation. This method exploits the traveling-wave components of the electric field generated by an array of electrodes subjected to ac voltages with a phase delay between neighboring electrodes. In this article, we propose an alternative way of generating traveling-wave electric fields in microchannels. We apply a rotating electric field around a cylindrical insulating micropillar and the resulting traveling-wave modes induce particle drift around the cylinder. We term this phenomenon insulating traveling-wave electrophoresis (i-TWE) to distinguish it from standard TWE performed with arrays of microelectrodes. We characterized the particle drift experimentally and show a quantitative comparison of the particle velocity with theoretical predictions. Excellent agreement is found when the influence of electro-osmosis on the channel walls is also considered.
Fernández-mateo, Raúl
3c340726-0207-4644-b561-adaed86901b8
Calero, Víctor
4c270680-a83d-4c15-9cc6-df3fd34b79df
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
García-sánchez, Pablo
1dd0c963-1e9f-41a2-9aea-db9ba09d757c
Ramos, Antonio
79d60433-0c6b-4eaa-80ac-e2f61e704f72
July 2023
Fernández-mateo, Raúl
3c340726-0207-4644-b561-adaed86901b8
Calero, Víctor
4c270680-a83d-4c15-9cc6-df3fd34b79df
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
García-sánchez, Pablo
1dd0c963-1e9f-41a2-9aea-db9ba09d757c
Ramos, Antonio
79d60433-0c6b-4eaa-80ac-e2f61e704f72
Fernández-mateo, Raúl, Calero, Víctor, Morgan, Hywel, García-sánchez, Pablo and Ramos, Antonio
(2023)
Insulating traveling-wave electrophoresis.
Physical Review E, 108 (1), [015104].
(doi:10.1103/PhysRevE.108.015104).
Abstract
Traveling-wave electrophoresis (TWE) is a method for transporting charged colloidal particles used in many microfluidic techniques for particle manipulation and fractionation. This method exploits the traveling-wave components of the electric field generated by an array of electrodes subjected to ac voltages with a phase delay between neighboring electrodes. In this article, we propose an alternative way of generating traveling-wave electric fields in microchannels. We apply a rotating electric field around a cylindrical insulating micropillar and the resulting traveling-wave modes induce particle drift around the cylinder. We term this phenomenon insulating traveling-wave electrophoresis (i-TWE) to distinguish it from standard TWE performed with arrays of microelectrodes. We characterized the particle drift experimentally and show a quantitative comparison of the particle velocity with theoretical predictions. Excellent agreement is found when the influence of electro-osmosis on the channel walls is also considered.
Text
PhysRevE.108.015104
- Version of Record
More information
Accepted/In Press date: 29 June 2023
e-pub ahead of print date: 24 July 2023
Published date: July 2023
Additional Information:
Funding Information:
P.G.S. and A.R. acknowledge Grant No. P20_00534 funded by “Consejería de Economía, Conocimiento, Empresas y Universidad (Junta de Andalucía)”.
Publisher Copyright:
© 2023 authors. Published by the American Physical Society.
Identifiers
Local EPrints ID: 480343
URI: http://eprints.soton.ac.uk/id/eprint/480343
ISSN: 1539-3755
PURE UUID: 0177b7ef-e34b-468c-a222-28a589b24437
Catalogue record
Date deposited: 01 Aug 2023 17:24
Last modified: 18 Mar 2024 02:58
Export record
Altmetrics
Contributors
Author:
Raúl Fernández-mateo
Author:
Víctor Calero
Author:
Hywel Morgan
Author:
Pablo García-sánchez
Author:
Antonio Ramos
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics