Electrostatic potential wells for on-demand drop manipulation in microchannels

Riëlle de Ruiter, Arjen Pit, V. Martins de Oliveira, Michael H.G. Duits, Henricus T.M. van den Ende, Friedrich Gunther Mugele

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)

Abstract

Precise control and manipulation of individual drops are crucial in many lab-on-a-chip applications. We present a novel hybrid concept for channel-based discrete microfluidics with integrated electrowetting functionality by incorporating co-planar electrodes (separated by a narrow gap) in one of the microchannel walls. By combining the high throughput of channel-based microfluidics with the individual drop control achieved using electrical actuation, we acquire the strengths of both worlds. The tunable strength of the electrostatic forces enables a wide range of drop manipulations, such as on-demand trapping and release, guiding, and sorting of drops in the microchannel. In each of these scenarios, the retaining electrostatic force competes with the hydrodynamic drag force. The conditions for trapping can be predicted using a simple model that balances these forces.
Original languageEnglish
Pages (from-to)883-891
JournalLab on a chip
Volume14
Issue number5
DOIs
Publication statusPublished - 2014

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Microfluidics
Microchannels
Static Electricity
Electrowetting
Electrostatics
Electrostatic force
Hydrodynamics
Lab-on-a-chip
Electrodes
Sorting
Drag
Throughput

Keywords

  • METIS-308372
  • IR-93804

Cite this

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title = "Electrostatic potential wells for on-demand drop manipulation in microchannels",
abstract = "Precise control and manipulation of individual drops are crucial in many lab-on-a-chip applications. We present a novel hybrid concept for channel-based discrete microfluidics with integrated electrowetting functionality by incorporating co-planar electrodes (separated by a narrow gap) in one of the microchannel walls. By combining the high throughput of channel-based microfluidics with the individual drop control achieved using electrical actuation, we acquire the strengths of both worlds. The tunable strength of the electrostatic forces enables a wide range of drop manipulations, such as on-demand trapping and release, guiding, and sorting of drops in the microchannel. In each of these scenarios, the retaining electrostatic force competes with the hydrodynamic drag force. The conditions for trapping can be predicted using a simple model that balances these forces.",
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Electrostatic potential wells for on-demand drop manipulation in microchannels. / de Ruiter, Riëlle; Pit, Arjen; Martins de Oliveira, V.; Duits, Michael H.G.; van den Ende, Henricus T.M.; Mugele, Friedrich Gunther.

In: Lab on a chip, Vol. 14, No. 5, 2014, p. 883-891.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Electrostatic potential wells for on-demand drop manipulation in microchannels

AU - de Ruiter, Riëlle

AU - Pit, Arjen

AU - Martins de Oliveira, V.

AU - Duits, Michael H.G.

AU - van den Ende, Henricus T.M.

AU - Mugele, Friedrich Gunther

PY - 2014

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AB - Precise control and manipulation of individual drops are crucial in many lab-on-a-chip applications. We present a novel hybrid concept for channel-based discrete microfluidics with integrated electrowetting functionality by incorporating co-planar electrodes (separated by a narrow gap) in one of the microchannel walls. By combining the high throughput of channel-based microfluidics with the individual drop control achieved using electrical actuation, we acquire the strengths of both worlds. The tunable strength of the electrostatic forces enables a wide range of drop manipulations, such as on-demand trapping and release, guiding, and sorting of drops in the microchannel. In each of these scenarios, the retaining electrostatic force competes with the hydrodynamic drag force. The conditions for trapping can be predicted using a simple model that balances these forces.

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