The Surface Charge Density Influence on the Electrokinetic Properties of Model Colloids: Solvent Composition Effect

An Experimental Test of the Ion Condensation Theory for Spherical Colloidal Particles

“…As can be seen, a qualitative relation between mobility and surface charge density seems to exist: the higher the former, the higher the latter. It should be also stressed that the widely reported maximun (in absolute value) in mobility (19) does not appear, which agrees with the results found by El Gholabzouri et al According to these authors, the mentioned maximun does not appear if the magnitude of surface charge is smaller than 3.40 µC · cm −2 (20). From these measurements, the surface charge enclosed by the shear plane was again calculated.…”

Electrokinetic behavior of melamine–formaldehyde latex particles at moderate electrolyte concentration

“…It may be particularly pronounced when the electrophoretic mobility is plotted as a function of indifferent electrolyte concentration. Then a maximum is observed in the electrophoretic mobility between 10 À4 and 10 À2 M [1][2][3][4][5][6][7]. This observation contradicts the expectation by the Gouy-Chapman model for the electrical double layer that the f-potentials would decrease with an increase in electrolyte concentration.…”

Streaming current and wall dissolution over 48h in silica nanochannels

“…Regarding 2D corner effects in pressure-driven flows in nanometer-sized geometries, some studies involved complex or poorly defined networks of nanochannels, such as those found in porous glass [15], columns packed with latex beads [16], and sandstone cores [17], while other studies on desalination [18][19][20] and energy conversion [15,[21][22][23][24] involved geometries where simpler 1D models sufficed. In the latter studies, streaming currents were measured in individual rectangular silica nanochannels as functions of varying pressure, channel height, as well as salt concentration.…”