Article
Insulating Traveling-wave Electrophoresis
Author/s | Fernández Mateo, Raúl
Calero Martín, Víctor Morgan, Hywel García Sánchez, Pablo Ramos Reyes, Antonio |
Department | Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo |
Publication Date | 2023 |
Deposit Date | 2024-02-21 |
Published in |
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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 ... 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. |
Funding agencies | Junta de Andalucía |
Project ID. | P20_00534 |
Citation | Fernández Mateo, R., Calero Martín, V., Morgan, H., García Sánchez, P. y Ramos Reyes, A. (2023). Insulating Traveling-wave Electrophoresis. Physical Review E, 108 (1), 015104. https://doi.org/10.1103/PhysRevE.108.015104. |
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