A new floating electrode structure for generating homogeneous electrical fields in microfluidic channels

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

In this article a new parallel electrode structure in a microfluidic channel is described that makes use of a floating electrode to get a homogeneous electrical field. Compared to existing parallel electrode structures, the new structure has an easier production process and there is no need for an electrical connection to both sides of the microfluidic chip. With the new chip design, polystyrene beads suspended in background electrolyte have been detected using electrical impedance measurements. The results of electrical impedance changes caused by beads passing the electrodes are compared with results in a similar planar electrode configuration. It is shown that in the new configuration the coefficient of variation of the impedance changes is lower compared to the planar configuration (0.39 versus 0.56) and less dependent on the position of the beads passage in the channel as a result of the homogeneous electrical field. To our knowledge this is the first time that a floating electrode is used for the realization of a parallel electrode structure. The proposed production method for parallel electrodes in microfluidic channels can easily be applied to other applications
Original languageUndefined
Pages (from-to)1995-2001
Number of pages7
JournalLab on a chip
Volume11
Issue number12
DOIs
Publication statusPublished - 2011

Keywords

  • EWI-20329
  • IR-77673
  • METIS-277715

Cite this

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title = "A new floating electrode structure for generating homogeneous electrical fields in microfluidic channels",
abstract = "In this article a new parallel electrode structure in a microfluidic channel is described that makes use of a floating electrode to get a homogeneous electrical field. Compared to existing parallel electrode structures, the new structure has an easier production process and there is no need for an electrical connection to both sides of the microfluidic chip. With the new chip design, polystyrene beads suspended in background electrolyte have been detected using electrical impedance measurements. The results of electrical impedance changes caused by beads passing the electrodes are compared with results in a similar planar electrode configuration. It is shown that in the new configuration the coefficient of variation of the impedance changes is lower compared to the planar configuration (0.39 versus 0.56) and less dependent on the position of the beads passage in the channel as a result of the homogeneous electrical field. To our knowledge this is the first time that a floating electrode is used for the realization of a parallel electrode structure. The proposed production method for parallel electrodes in microfluidic channels can easily be applied to other applications",
keywords = "EWI-20329, IR-77673, METIS-277715",
author = "Segerink, {Loes Irene} and A.J. Sprenkels and Bomer, {Johan G.} and I. Vermes and {van den Berg}, Albert",
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year = "2011",
doi = "10.1039/c0lc00489h",
language = "Undefined",
volume = "11",
pages = "1995--2001",
journal = "Lab on a chip",
issn = "1473-0197",
publisher = "Royal Society of Chemistry",
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A new floating electrode structure for generating homogeneous electrical fields in microfluidic channels. / Segerink, Loes Irene; Sprenkels, A.J.; Bomer, Johan G.; Vermes, I.; van den Berg, Albert.

In: Lab on a chip, Vol. 11, No. 12, 2011, p. 1995-2001.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - A new floating electrode structure for generating homogeneous electrical fields in microfluidic channels

AU - Segerink, Loes Irene

AU - Sprenkels, A.J.

AU - Bomer, Johan G.

AU - Vermes, I.

AU - van den Berg, Albert

N1 - eemcs-eprint-20329

PY - 2011

Y1 - 2011

N2 - In this article a new parallel electrode structure in a microfluidic channel is described that makes use of a floating electrode to get a homogeneous electrical field. Compared to existing parallel electrode structures, the new structure has an easier production process and there is no need for an electrical connection to both sides of the microfluidic chip. With the new chip design, polystyrene beads suspended in background electrolyte have been detected using electrical impedance measurements. The results of electrical impedance changes caused by beads passing the electrodes are compared with results in a similar planar electrode configuration. It is shown that in the new configuration the coefficient of variation of the impedance changes is lower compared to the planar configuration (0.39 versus 0.56) and less dependent on the position of the beads passage in the channel as a result of the homogeneous electrical field. To our knowledge this is the first time that a floating electrode is used for the realization of a parallel electrode structure. The proposed production method for parallel electrodes in microfluidic channels can easily be applied to other applications

AB - In this article a new parallel electrode structure in a microfluidic channel is described that makes use of a floating electrode to get a homogeneous electrical field. Compared to existing parallel electrode structures, the new structure has an easier production process and there is no need for an electrical connection to both sides of the microfluidic chip. With the new chip design, polystyrene beads suspended in background electrolyte have been detected using electrical impedance measurements. The results of electrical impedance changes caused by beads passing the electrodes are compared with results in a similar planar electrode configuration. It is shown that in the new configuration the coefficient of variation of the impedance changes is lower compared to the planar configuration (0.39 versus 0.56) and less dependent on the position of the beads passage in the channel as a result of the homogeneous electrical field. To our knowledge this is the first time that a floating electrode is used for the realization of a parallel electrode structure. The proposed production method for parallel electrodes in microfluidic channels can easily be applied to other applications

KW - EWI-20329

KW - IR-77673

KW - METIS-277715

U2 - 10.1039/c0lc00489h

DO - 10.1039/c0lc00489h

M3 - Article

VL - 11

SP - 1995

EP - 2001

JO - Lab on a chip

JF - Lab on a chip

SN - 1473-0197

IS - 12

ER -