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Dependence of Nonlinear Electrophoresis on Particle Size and Electrical Charge
This study focuses on the dependence of nonlinear electrophoretic
migration of particles on the particle size and particle electrical
charge. This is the first report of the experimental assessment of
the mobilities of the nonlinear electrophoretic velocity of colloidal
polystyrene microparticles under two distinct electric field dependences.
A total of nine distinct types of polystyrene microparticles of varying
size and varying electrical charge were divided into two groups to
study separately the effects of particle size and the effects of particle
charge. The mobilities of the nonlinear electrophoretic velocity of
each particle type were determined in both the cubic and 3/2 regimes
(μEP,NL(3) and μEP,NL(3/2)). The results unveiled that both mobilities had
similar relationships with particle size and charge. The magnitude
of both μEP,NL(3) and μEP,NL(3/2) increased with increasing particle size and decreased
with increasing magnitude of particle charge. However, the observed
trends were not perfect as discussed in the Results and Discussion
section but still provide valuable information. These findings will
aid in the design of future size-based and charge-based separations
of particles and microorganisms