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In-situ AC electroosmotic and thermal perturbation effects for wide range of ionic strength

1 Department of Electrical Engineering, Microsystem Research Group, University of Bonab, Bonab 5551761167, Iran
2 Department of Electrical Engineering, Urmia University, Urmia 5756151818, Iran

Topical Section: Lab-on-a-Chip, Microfluidics & Microarrays

AC electrokinetic flow is promising in designing microfluidic chips for manipulation of biological and chemical samples toward clinical diagnostics. Four pieces of electrodes are optimized to enhance mixing effect inside a straight microchannel. In this research, the mixing dependency on the ionic strength of solutions is investigated. AC electroosmotic secondary flow is responsible for the mixing at low ionic strength (σ < 5 mS m–1), whereas AC electrothermal secondary flow is proposed to mix high conductive mediums (σ > 5 mS m–1). The electrode-electrolyte impedance analysis is employed to facilitate the in-situation mixing process by choosing appropriate electrical excitation parameters for the electrodes.
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Keywords ac electroosmotic; ac electrothermal; chaotic regime; microfluidic; electric conductivity

Citation: Reza Hadjiaghaie Vafaie, Aysan Madanpasandi. In-situ AC electroosmotic and thermal perturbation effects for wide range of ionic strength. AIMS Biophysics, 2017, 4(3): 451-464. doi: 10.3934/biophy.2017.3.451

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Copyright Info: © 2017, Reza Hadjiaghaie Vafaie, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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