Electroosmotic flow: From microfluidics to nanofluidics
نویسندگان
چکیده
منابع مشابه
Electroosmotic shear flow in microchannels.
We generate and study electroosmotic shear flow in microchannels. By chemically or electrically modifying the surface potential of the channel walls a shear flow component with controllable velocity gradient can be added to the electroosmotic flow caused by double layer effects at the channel walls. Chemical modification is obtained by treating the channel wall with a cationic polymer. In case ...
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We report the measurement of electroosmotic mobilities in nanofluidic channels with rectangular cross sections and compare our results with theory. Nanofluidic channels were milled directly into borosilicate glass between two closely spaced microchannels with a focused ion beam instrument, and the nanochannels had half-depths (h) of 27, 54, and 108 nm and the same half-width of 265 nm. We measu...
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It is a pleasure to present this special issue on nanofluidics. Spurred by rapid technological advances in micromachining techniques, the research field of nanofluidics appeared about ten years ago. Nanofluidics is generally defined as the study of liquid flow in and around objects of 100 nm and less, and the applications thereof. Of course fluid research on this scale had already been studied ...
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A theoretical model of the EOF and hydrodynamic flow in wide closed cylindrical capillaries, after the application of a stepwise voltage, is developed. Analytical expressions have been obtained as a sum of the solutions for the direct flow and backflow in both periodical and aperiodical regimes with arbitrary pulse/pulse or pulse/pause durations and amplitudes. The numerical analysis, performed...
متن کاملTime-periodic Electroosmotic Flow of Non-newtonian Fluids in Microchannels
The alternating current electroosmotic flow of a non-Newtonian power-law fluid is studied in a circular microchannel. A numerical method is employed to solve the non-linear Poisson-Boltzmann and the momentum equations. The main parameters which affect the flow field are the flow behavior index, the dimensionless zeta potential and the dimensionless frequency. At very low dimensionless frequenci...
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ژورنال
عنوان ژورنال: ELECTROPHORESIS
سال: 2021
ISSN: 0173-0835,1522-2683
DOI: 10.1002/elps.202000313