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Electroosmotic control of width and position of liquid streams in hydrodynamic focusing

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Electroosmotic control of width and position of liquid streams in hydrodynamic focusing

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dc.contributor.author Li, Haiwang
dc.contributor.author Wong, Teck Neng
dc.contributor.author Nguyen, Nam-Trung
dc.date.accessioned 2012-05-10T03:47:53Z
dc.date.available 2012-05-10T03:47:53Z
dc.date.copyright 2009
dc.date.issued 2012-05-10
dc.identifier.citation Li, H. W., Wong,T. N., & Nguyen, N. T. (2009). Electroosmotic control of width and position of liquid streams in hydrodynamic focusing. Microfluidics and Nanofluidics, 7(4), 489-497.
dc.identifier.uri http://hdl.handle.net/10220/7837
dc.description.abstract This paper presents theoretical and experimental investigations on electroosmotic control of stream width in hydrodynamic focusing. In the experiments, three liquids (aqueous NaCl, aqueous glycerol and aqueous NaCl) are introduced by syringe pumps to flow side by side in a straight rectangular microchannel. External electric fields are applied on the two aqueous NaCl streams. Under the same inlet volumetric flow rates, the applied electric fields are varied to control the interface positions and consequently the width of the focused aqueous glycerol stream. The electroosmotic effect on the width of the aqueous glycerol is measured using fluorescence imaging technique. The electroosmotic effect under different flow rates, different viscosity, and aspect ratio are investigated. The results indicate that the electroosmotic effect on the pressure-driven flow becomes weaker with the increase in flow rates, viscosity ratio or aspect ratio of the channel. The measured results of the focused width of the non-conducting fluid agree well with the analytical model.
dc.format.extent 22 p.
dc.language.iso en
dc.relation.ispartofseries Microfluidics and nanofluidics
dc.rights © 2009 Springer-Verlag. This is the author created version of a work that has been peer reviewed and accepted for publication by Microfluidics and nanofluidics, Springer-Verlag. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1007/s10404-009-0402-0.
dc.subject DRNTU::Engineering::Mechanical engineering.
dc.title Electroosmotic control of width and position of liquid streams in hydrodynamic focusing
dc.type Journal Article
dc.contributor.school School of Mechanical and Aerospace Engineering
dc.identifier.doi http://dx.doi.org/10.1007/s10404-009-0402-0
dc.identifier.rims 140776

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