Controlling AC-Electroosmotic vortex flows by shaping the channel cross section

Christina  Tiflidis; Eiko Westerbeek; Koen Jorissen; Wouter  Olthuis; Jan Eijkel; Wim  De Malsche

Controlling AC-Electroosmotic vortex flows by shaping the channel cross section

Christina Tiflidis, Eiko Westerbeek, Koen Jorissen, Wouter Olthuis, Jan Eijkel, Wim De Malsche

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

This work demonstrates the ability to control lateral AC-electroosmotic flow (AC-EOF) by changing channel wall shapes. AC-EOF is generated by a tangential E-field component at the electrodes, causing a Coulomb force on the ions in the electrode double layers. When the electrode polarity changes, both E-field and ionic charge change polarity, maintaining a constant direction of AC-EOF. Classically, AC-EOF is generated by shaping the electrode geometry [1,2]. However, AC-EOF is also generated for example when a dielectric particle levitates above an electrode surface, causing locally curved E-field lines [3,4,5,6]. Here we show that a similar phenomenon occurs when field lines are shaped by nonconducting walls. We designed channels with electrodes at top and bottom and variously shaped insulating side walls and show we can create differently shaped vortices.

Original language	English
Title of host publication	24th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2020)
Subtitle of host publication	Proceedings of a meeting held 4-9 October 2020, Online
Publisher	The Chemical and Biological Microsystems Society
Pages	38-39
Number of pages	2
ISBN (Print)	978-1-7334190-1-7, 978-1-7138212-3-6 (Set)
Publication status	Published - 9 Oct 2020
Event	24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2020 - Virtual Event Duration: 4 Oct 2020 → 9 Oct 2020 Conference number: 24 https://microtas2020.org/

Conference

Conference	24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2020
Abbreviated title	MicroTAS 2020
City	Virtual Event
Period	4/10/20 → 9/10/20
Internet address	https://microtas2020.org/

Keywords

2021 OA procedure

Access to Document

MicroTAS2020_TiflidisFinal published version, 438 KBLicence: Taverne

Cite this

Tiflidis, C., Westerbeek, E., Jorissen, K., Olthuis, W., Eijkel, J., & De Malsche, W. (2020). Controlling AC-Electroosmotic vortex flows by shaping the channel cross section. In 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2020): Proceedings of a meeting held 4-9 October 2020, Online (pp. 38-39). Article 0038 The Chemical and Biological Microsystems Society.

Tiflidis, Christina ; Westerbeek, Eiko ; Jorissen, Koen et al. / Controlling AC-Electroosmotic vortex flows by shaping the channel cross section. 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2020): Proceedings of a meeting held 4-9 October 2020, Online. The Chemical and Biological Microsystems Society, 2020. pp. 38-39

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title = "Controlling AC-Electroosmotic vortex flows by shaping the channel cross section",

abstract = "This work demonstrates the ability to control lateral AC-electroosmotic flow (AC-EOF) by changing channel wall shapes. AC-EOF is generated by a tangential E-field component at the electrodes, causing a Coulomb force on the ions in the electrode double layers. When the electrode polarity changes, both E-field and ionic charge change polarity, maintaining a constant direction of AC-EOF. Classically, AC-EOF is generated by shaping the electrode geometry [1,2]. However, AC-EOF is also generated for example when a dielectric particle levitates above an electrode surface, causing locally curved E-field lines [3,4,5,6]. Here we show that a similar phenomenon occurs when field lines are shaped by nonconducting walls. We designed channels with electrodes at top and bottom and variously shaped insulating side walls and show we can create differently shaped vortices.",

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author = "Christina Tiflidis and Eiko Westerbeek and Koen Jorissen and Wouter Olthuis and Jan Eijkel and {De Malsche}, Wim",

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Tiflidis, C, Westerbeek, E, Jorissen, K, Olthuis, W, Eijkel, J & De Malsche, W 2020, Controlling AC-Electroosmotic vortex flows by shaping the channel cross section. in 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2020): Proceedings of a meeting held 4-9 October 2020, Online., 0038, The Chemical and Biological Microsystems Society, pp. 38-39, 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2020, Virtual Event, 4/10/20.

Controlling AC-Electroosmotic vortex flows by shaping the channel cross section. / Tiflidis, Christina ; Westerbeek, Eiko; Jorissen, Koen et al.
24th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2020): Proceedings of a meeting held 4-9 October 2020, Online. The Chemical and Biological Microsystems Society, 2020. p. 38-39 0038.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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T1 - Controlling AC-Electroosmotic vortex flows by shaping the channel cross section

AU - Tiflidis, Christina

AU - Westerbeek, Eiko

AU - Jorissen, Koen

AU - Olthuis, Wouter

AU - Eijkel, Jan

AU - De Malsche, Wim

N1 - Conference code: 24

PY - 2020/10/9

Y1 - 2020/10/9

N2 - This work demonstrates the ability to control lateral AC-electroosmotic flow (AC-EOF) by changing channel wall shapes. AC-EOF is generated by a tangential E-field component at the electrodes, causing a Coulomb force on the ions in the electrode double layers. When the electrode polarity changes, both E-field and ionic charge change polarity, maintaining a constant direction of AC-EOF. Classically, AC-EOF is generated by shaping the electrode geometry [1,2]. However, AC-EOF is also generated for example when a dielectric particle levitates above an electrode surface, causing locally curved E-field lines [3,4,5,6]. Here we show that a similar phenomenon occurs when field lines are shaped by nonconducting walls. We designed channels with electrodes at top and bottom and variously shaped insulating side walls and show we can create differently shaped vortices.

AB - This work demonstrates the ability to control lateral AC-electroosmotic flow (AC-EOF) by changing channel wall shapes. AC-EOF is generated by a tangential E-field component at the electrodes, causing a Coulomb force on the ions in the electrode double layers. When the electrode polarity changes, both E-field and ionic charge change polarity, maintaining a constant direction of AC-EOF. Classically, AC-EOF is generated by shaping the electrode geometry [1,2]. However, AC-EOF is also generated for example when a dielectric particle levitates above an electrode surface, causing locally curved E-field lines [3,4,5,6]. Here we show that a similar phenomenon occurs when field lines are shaped by nonconducting walls. We designed channels with electrodes at top and bottom and variously shaped insulating side walls and show we can create differently shaped vortices.

KW - 2021 OA procedure

M3 - Conference contribution

SN - 978-1-7334190-1-7

SN - 978-1-7138212-3-6 (Set)

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BT - 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2020)

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Tiflidis C, Westerbeek E, Jorissen K, Olthuis W, Eijkel J, De Malsche W. Controlling AC-Electroosmotic vortex flows by shaping the channel cross section. In 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2020): Proceedings of a meeting held 4-9 October 2020, Online. The Chemical and Biological Microsystems Society. 2020. p. 38-39. 0038