On the conversion of experimental electrokinetic data into double layer characteristics in solid-liquid interfaces

Zeta potential of microfluidic substrates: 1. Theory, experimental techniques, and effects on separations

“…While the third method is common in studies of colloidal suspensions, this paper is primarily focused on the effects in a channel or other conduit and the work summarized here is restricted to the first two methods. Interpretation of data for submicron particles is more complicated than for capillaries or microchannels larger than 5 mm due to the relative size of the EDL compared to the particle radius [2,4]; this method has been discussed in detail [46], owing to the importance of colloidal suspensions in a variety of practical industrial, chemical, and pharmaceutical products.…”

Electrokinetic Characterization of Poly(N-isopropylacrylamide) Microgel Particles: Effect of Electrolyte Concentration and Temperature

“…ψ DON is the Donnan potential in the shell and ψ 0 is the "surface" potential (i.e., the potential in the limit between the particle and the solution) (11), [5] where n ∞ is the bulk electrolyte concentration and the other symbols have their usual meaning: z is the valence of the symmetrical electrolyte, e is the elementary charge, k is the Boltzmann constant, and T is the absolute temperature.…”

“…The electrophoretic mobility of colloidal particles has been dealt with considering hard spheres with surface charge density (5,6) or spherical polyelectrolytes (7)(8)(9). Recently, soft particles have also been considered, and the theories for the electrophoresis of spherical colloidal particles have been unified (10), deriving analytic mobility expressions applicable for various limiting cases.…”

Extended Electrokinetic Characterization of Flat Solid Surfaces

“…Recently accumulated experience concerning the surface characterization of suspended spherical particles demonstrates the high efficiency of the comprehensive electrokinetic investigations in comparison with the measurement of a single electrokinetic phenomenon: measurement of the electrical conductance of diluted latex dispersions as a function of volume fraction (20), measurements of low-frequency dielectric dispersion on latex particles (21) and biological cells (22), combined electroacoustic and dielectric measurements (23), and combined electrophoresis and conductance measurements (24) made it possible to calculate K and, based on that, m (mobile charge density). m was found to be close to t (titratable charge density) in the mentioned cases.…”