Results 161 to 170 of about 1,223 (198)

Electrokinetics

Up to now, we have only considered stationary or static charges, which are sources of electrostatic fields. Stationary charges are studied in electrostatics. Electrokinetics, on the other hand, is the branch of electromagnetism devoted to the study of electric currents (i.e.
Kishore K. Mohanty, William R. Rossen, Chun Huh   +2 more
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Electrokinetics

2023
Abstract The chapters concerns electrokinetic phenomena, treated in general and in the context of microfluidics. Bascic laws are reviewed. Electrokinetic equations are given, leading to Debye layer, elecroosmosis, sedimentation potential, electrophoresis, along with the various methods of separation used in the field, such as free ...
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A novel electrokinetic micromixer

Sensors and Actuators A: Physical, 2004
A novel microfluidic mixer based on the modulation of /spl zeta/-potential is proposed and demonstrated successfully. In contrast to previous micromixer work from other groups, this micromixer does not need complex three-dimensional serpentine microstructure or external pumps to generate chaotic advection pulsatile flow.
H WU, C LIU
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Electrokinetic Scanning Probe

Small, 2019
AbstractThe theoretical analysis and experimental demonstration of a new concept are presented for a non‐contact scanning probe, in which transport of fluid and molecules is controlled by electric fields. The electrokinetic scanning probe (ESP) enables local chemical and biochemical interactions with surfaces in liquid environments.
Nadya Ostromohov, Baruch Rofman, Moran Bercovici, Govind Kaigala   +3 more
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Microemulsion Electrokinetic Chromatography

2008
Microemulsion electrokinetic chromatography (MEEKC) is an attractive capillary electrophoretic technique in which a microemulsion is used as carrier electrolyte. Analytes may partition between the aqueous phase of the microemulsion and its oil droplets, which act as a pseudostationary phase. It is well suited for the separation of neutral analytes, but
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Electrokinetics of metal cylinders

Physical Review E, 2019
We study theoretically the rotation induced on an uncharged metal nanocylinder immersed in an electrolyte by AC electric fields. We consider the rotation of the cylinder when subjected to a rotating electric field (electrorotation) and the orientation of the cylinder in an AC field with constant direction (electro-orientation). The cylinder rotation is
J E, Flores-Mena, Pablo, García-Sánchez, Antonio, Ramos   +2 more
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Electrokinetics on superhydrophobic surfaces

Journal of Physics: Condensed Matter, 2012
On a superhydrophobic surface a liquid is exposed to a large air-water interface. The reduced wall friction is expected to cause a higher electro-osmotic mobility. On the other hand, the low charge density of a superhydrophobic surface reduces the electro-osmotic mobility.
Papadopoulos, P., Deng, X., Vollmer, D., Butt, H.   +3 more
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Electrokinetics of heterogeneous interfaces

Advances in Colloid and Interface Science, 2004
The influence of surface heterogeneity of various types on electrokinetic parameters is reviewed. The scope of the paper covers classical electrokinetic phenomena characterized by linear dependence of electrokinetic parameters vs. related driving forces. Neither non-linear effects nor the effects of non-equilibrium electric double layer are considered.
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Bistability and Electrokinetic Oscillations

Journal of Colloid and Interface Science, 1999
Nonlinear dynamic behavior and electrokinetic oscillations have been investigated for the membrane systems (a) 0.1 N NaCl/KCl parallel Millipore filter parallel 0.01 N NaCl/KCl; (b) 0.1 N NaCl/KCl parallel Whatman Inorganic filter parallel 0.01 N NaCl/KCl; and (c) 0.1 N NaCl/KCl parallel silver-coated filter parallel 0.01 N NaCl/KCl, from the viewpoint
, Rastogi, , Mishra, , Pandey, , Bala, , Kumar   +4 more
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Electrokinetic Instability Micromixing

Analytical Chemistry, 2001
We have developed an electrokinetic process to rapidly stir micro- and nanoliter volume solutions for microfluidic bioanalytical applications. We rapidly stir microflow streams by initiating a flow instability, which we have observed in sinusoidally oscillating, electroosmotic channel flows.
M H, Oddy, J G, Santiago, J C, Mikkelsen
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