Transient currents in electrolyte displacement by asymmetric electro-osmosis and determination of surface zeta potentials of composite microchannels

Ang Tsung Kuo, Chien-Hsiang Chang, Hsien-Hung Wei

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this article, we demonstrate the determination of surface zeta potentials of composite microchannels using the electric-field-driven solution displacement method. Nonuniform surface charge creates linear electro-osmotic flow, which leads to asymmetric displacement. Simplified circuit models are derived to determine the surface zeta potentials through examining the behavior of transient currents during the displacement. The effects of dispersion on the measured zeta potentials are discussed in line with the flow characteristics under different surface charge conditions.

Original languageEnglish
Article number244102
JournalApplied Physics Letters
Volume92
Issue number24
DOIs
Publication statusPublished - 2008 Jun 30

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osmosis
microchannels
electrolytes
composite materials
flow characteristics
electric fields

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "In this article, we demonstrate the determination of surface zeta potentials of composite microchannels using the electric-field-driven solution displacement method. Nonuniform surface charge creates linear electro-osmotic flow, which leads to asymmetric displacement. Simplified circuit models are derived to determine the surface zeta potentials through examining the behavior of transient currents during the displacement. The effects of dispersion on the measured zeta potentials are discussed in line with the flow characteristics under different surface charge conditions.",
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Transient currents in electrolyte displacement by asymmetric electro-osmosis and determination of surface zeta potentials of composite microchannels. / Kuo, Ang Tsung; Chang, Chien-Hsiang; Wei, Hsien-Hung.

In: Applied Physics Letters, Vol. 92, No. 24, 244102, 30.06.2008.

Research output: Contribution to journalArticle

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N2 - In this article, we demonstrate the determination of surface zeta potentials of composite microchannels using the electric-field-driven solution displacement method. Nonuniform surface charge creates linear electro-osmotic flow, which leads to asymmetric displacement. Simplified circuit models are derived to determine the surface zeta potentials through examining the behavior of transient currents during the displacement. The effects of dispersion on the measured zeta potentials are discussed in line with the flow characteristics under different surface charge conditions.

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