Results 181 to 190 of about 6,287 (220)
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Electroosmotic flow in poly(dimethylsiloxane) microchannels
Journal of Chromatography A, 2005This paper reports on the study of electroosmotic flow (EOF) in poly(dimethylsiloxane) (PDMS) microchannels on the basis of indirect amperometric detection method. Gradual increase of EOF rate in freshly prepared PDMS microchannels was observed with the running buffer of phosphate buffer solution (PBS).
Ning, Bao +4 more
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Japanese Journal of Applied Physics, 1999
Growth of electroosmotic circulation (EOC) of a liquid in a closed capillary, which is generated after the application of an electric field between the two electrodes which cover the ends of the silica capillary, is examined numerically.
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Growth of electroosmotic circulation (EOC) of a liquid in a closed capillary, which is generated after the application of an electric field between the two electrodes which cover the ends of the silica capillary, is examined numerically.
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Modulation of Electroosmotic Flow by Neutral Polymers
Langmuir, 2007Polymer coating is widely used to modulate the fluid flow in micro- and nanometer pores and flows that are sensitive to surface properties such as electroosmotic flow. Here we report on the dissipative particle dynamics simulations of the modulation of electroosmotic flow by neutral polymers.
Rui, Qiao, Ping, He
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Characterizing electroosmotic flow in microfluidic devices
Journal of Chromatography A, 2002The current-monitoring method was used to measure the electroosmotic flow (EOF) in borosilicate glass capillaries and zeonor plastic microfluidic devices. The surface of the zeonor devices must be oxidized to support EOF and this treatment shows signs of aging within 6 days.
J, Gaudioso, H G, Craighead
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Imaging of Electroosmotic Flow in Plastic Microchannels
Analytical Chemistry, 2001We have characterized electroosmotic flow in plastic microchannels using video imaging of caged fluorescent dye after it has been uncaged with a laser pulse. We studied flow in microchannels composed of a single material, poly(methyl methacrylate) (acrylic) or poly(dimethylsiloxane) (PDMS), as well as in hybrid microchannels composed of both materials.
D, Ross, T J, Johnson, L E, Locascio
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Electroosmotic guiding of sample flows in a laminar flow chamber
ELECTROPHORESIS, 2004AbstractThe so‐called address‐flow principle is described: a valveless, electroosmotically driven technology used for controlling the stream profile in a laminar flow chamber. The method is explained, and a theoretical description and experimental verification are presented.
Besselink, Geert A.J. +7 more
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Comments on the conditions for similitude in electroosmotic flows
Journal of Colloid and Interface Science, 2007This note provides a few comments on the conditions required for similitude between velocity and electric field in electroosmotic flows. The velocity fields of certain electroosmotic flows with relatively thin electric double layers (EDLs) are known to be irrotational in regions outside of the EDL.
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Hydrodynamic flow and electroosmotic flow in zirconia‐packed capillaries
ELECTROPHORESIS, 2006AbstractFused‐silica capillaries were packed with Zirchrom®‐PBD stationary phase for application in CEC, nanoLC and pseudoelectrochromatography (PEC). Acido‐basic properties of zirconia can be used to control the EOF even if the zirconia particles were coated by polybutadiene. As for native zirconia, the EOF is pH‐dependent and the pI is close to pH 5.
Myriam, Crosnier de Bellaistre +2 more
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Capillaries and the Electroosmotic Flow
2000The velocity of the electroosmotic flow (EOF) is a crucial parameter for separations by capillary electrophoresis. It determines the range of analyte mobilities that can be handled in a single run as well as the run time. Moreover, variations in the EOF, between different capillaries and between different runs on the same capillary, are the main source
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Electroosmotic Flows with Random Zeta Potential
Journal of Colloid and Interface Science, 2002The hydrodynamic problem of electroosmotic flow in a cylindrical capillary with random zeta potential is solved in the limit of small Deybe length and low Reynolds number. Averages are defined over multiple experiments and the mean axial velocity is found to be a plug flow.
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