Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/97974
Title: A method for simultaneously determining the zeta potentials of the channel surface and the tracer particles using microparticle image velocimetry technique
Authors: Yan, Deguang
Yang, Chun
Nguyen, Nam-Trung
Huang, Xiaoyang
Keywords: DRNTU::Engineering::Mechanical engineering
Issue Date: 2006
Source: Yan, D. G., Yang, C., Nguyen, N. T., & Huang, X. Y. (2006). A method for simultaneously determining the zeta potentials of the channel surface and the tracer particles using microparticle image velocimetry technique. Electrophoresis, 27(3), 620-627.
Series/Report no.: Electrophoresis
Abstract: The zeta potentials of channel surfaces and tracer particles are of importance to the design of electrokinetic microfluidic devices, the characterization of channel materials, and the quantification of the microparticle image velocimetry (microPIV) measurement of EOFs. A method is proposed to simultaneously measure the zeta potentials of the channel surface and the tracer particles in aqueous solutions using the microPIV technique. Through the measurement of the steady velocity distributions of the tracer particles in both open- and closed-end rectangular microchannels under the same water chemistry condition, the electrophoretic velocity of the tracer particles and the EOF field of the microchannel are determined using the expressions derived in this study for the velocity distributions of charged tracer particles in the open- and closed-end rectangular microchannels. Thus, the zeta potentials of the tracer particles and the channel surfaces are simultaneously obtained using the least-square method to fit the microPIV measured velocity distribution of the tracer particles. Measurements were carried out with a microPIV system to determine the zeta potentials of the channel wall and the fluorescent tracer particles in deionized water and sodium chloride and boric acid solutions of various concentrations.
URI: https://hdl.handle.net/10356/97974
http://hdl.handle.net/10220/7807
DOI: 10.1002/elps.200500713
Rights: © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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