Electrokinetic Motion of Particles

The underlying physical mechanisms for the electrokinetic motion of particles are described in other entries on Electroosmotic How (DC), Electrophoresis, Dielectrophoresis, Nonlinear Electrokinetic Phenomena, and Electrokinetic Motion of Polarizable Particles, along with various mathematical models. The effects of relaxing the assumptions above in these models, however, are often unexpected and have not yet been firUy explored, either theoretically or experimentally. Here, we simply give a few examples of how heterogeneous particles can move in electric fields. 

Electrokinetic Motion of Particles in Nanochannels, Fig.1 Schematic diagram of the transporting nanoparticle in a nanochannel. In this figure, NP represents the nanoparticle. Two reservoirs are connected by the nanochannel to each other. Two immersed electrodes... 

Kang Y, Li D (2009) Electrokinetic motion of particles and cells in microchannels. Microfluid Nanofluid 6(4) 431 0... 

Induced-Charge Electrokinetic Motion of Particle in a MicroChannel... 

Induced-Charge Electrokinetic Motion of Particle in a MicroChannel, Fig. 1 Charging process of an arbitrary shape conducting particle under a unifram applied electric field (a) initial electric field passing through the... 

The underlying physical mechanisms for the electrokinetic motion of particles are described in other articles on... 

The layer of counterions surrounding a charged particle is called the diffuse double layer and the concentration of counterions in the diffuse double layer is a function of the distance from the particle surface. When a charged particle moves with respect to the surrounding liquid, that is, electrophoresis, there is a plane of shear between the two phases and the electric potential at the plane of shear is called the zeta potential, f. This is the experimentally measured quantity computed from electrokinetic motion of particles. However, even if the zeta potential is not exactly the surface potential, o it is the value used for surface potential in calculations of electrostatic stabilization in the DLVO theory. Because the zeta potential determines the net interparticle forces in electrostatically stabilized systems... 

Dielectrophoresis is the electrokinetic motion of particles that occurs when a polarizable particle is placed in nonuniform electric fields, and the particle motion is influenced by the ambient electric field and by the properties of the dielectric particles or solutions (Lee et al., 2016 Song et al., 2012 Alshareef et al., 2013). Separation of particles and cells can also be achieved by microfiltration, which uses the size of micropores and the gap between microposts for the separation of particles and cells (Lee et al., 2016 Kang et al., 2014 Rodrigues et al., 2015). 

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