Evaluation of electroosmotic velocity and zeta-potential in microchannel using submicron fluorescent particles

Mitsuhisa Ichiyanagi; Yohei Sato; Koichi Hishida

doi:10.1299/kikaib.71.2316

Evaluation of electroosmotic velocity and zeta-potential in microchannel using submicron fluorescent particles

Mitsuhisa Ichiyanagi, Yohei Sato, Koichi Hishida

Department of System Design Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Measurements of electrophoretic and electroosmotic velocities were performed by using micron-resolution particle image velocimetry (micro-PIV) and submicron fluorescent particles. Electrophoretic velocity of particles was obtained by micro-PIV measurement in a closed cell, while electroosmotic velocity of buffer solution in a microchannel was calculated by subtracting electrophoretic verocity from observed velocity measured by micro-PIV. Both zeta-potential of particles and microchannel wall were obtained by using electrophoretic and electroosmotic velocities, respectively, which are increased with increasing pH of buffer solution, due to deprotonation. Transient process of zeta-potential at the wall surface in a T-shaped microchannel was detected by spatially-averaged electroosmotic velocities.

Original language	English
Pages (from-to)	2316-2323
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	71
Issue number	709
DOIs	https://doi.org/10.1299/kikaib.71.2316
Publication status	Published - 2005 Sep

Keywords

Deprotonation
Electroosmotic Flow
Electrophoresis
Micro-PIV
Submicron Fluorescent Particles
Zeta-Potential

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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10.1299/kikaib.71.2316

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Evaluation of electroosmotic velocity and zeta-potential in microchannel using submicron fluorescent particles. / Ichiyanagi, Mitsuhisa; Sato, Yohei; Hishida, Koichi.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 71, No. 709, 09.2005, p. 2316-2323.

Research output: Contribution to journal › Article › peer-review

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abstract = "Measurements of electrophoretic and electroosmotic velocities were performed by using micron-resolution particle image velocimetry (micro-PIV) and submicron fluorescent particles. Electrophoretic velocity of particles was obtained by micro-PIV measurement in a closed cell, while electroosmotic velocity of buffer solution in a microchannel was calculated by subtracting electrophoretic verocity from observed velocity measured by micro-PIV. Both zeta-potential of particles and microchannel wall were obtained by using electrophoretic and electroosmotic velocities, respectively, which are increased with increasing pH of buffer solution, due to deprotonation. Transient process of zeta-potential at the wall surface in a T-shaped microchannel was detected by spatially-averaged electroosmotic velocities.",

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N2 - Measurements of electrophoretic and electroosmotic velocities were performed by using micron-resolution particle image velocimetry (micro-PIV) and submicron fluorescent particles. Electrophoretic velocity of particles was obtained by micro-PIV measurement in a closed cell, while electroosmotic velocity of buffer solution in a microchannel was calculated by subtracting electrophoretic verocity from observed velocity measured by micro-PIV. Both zeta-potential of particles and microchannel wall were obtained by using electrophoretic and electroosmotic velocities, respectively, which are increased with increasing pH of buffer solution, due to deprotonation. Transient process of zeta-potential at the wall surface in a T-shaped microchannel was detected by spatially-averaged electroosmotic velocities.

AB - Measurements of electrophoretic and electroosmotic velocities were performed by using micron-resolution particle image velocimetry (micro-PIV) and submicron fluorescent particles. Electrophoretic velocity of particles was obtained by micro-PIV measurement in a closed cell, while electroosmotic velocity of buffer solution in a microchannel was calculated by subtracting electrophoretic verocity from observed velocity measured by micro-PIV. Both zeta-potential of particles and microchannel wall were obtained by using electrophoretic and electroosmotic velocities, respectively, which are increased with increasing pH of buffer solution, due to deprotonation. Transient process of zeta-potential at the wall surface in a T-shaped microchannel was detected by spatially-averaged electroosmotic velocities.

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Evaluation of electroosmotic velocity and zeta-potential in microchannel using submicron fluorescent particles

Abstract

Keywords

ASJC Scopus subject areas

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