Journal ArticleDOI
Investigation of Dynamic Stern Layer of Liposomes by Measurements of Conductivity and Electrophoresis
TLDR
In this paper, the large surface diffusitivities of polyvalent ions adsorbed on negatively charged liposomes are found combining measurements of conductivity and electrophoresis.Abstract:
Ionic surface diffusitivity is important parameter for the electrostatic interaction between colloid particles and hence its measurement is a new important factor for the surface characterization of colloid particles. If the adsorbed ion mobility is small the approximation of the interaction at constant charge can be valid,but in opposite case the charge regulation occurs during their interaction. The large surface diffusitivities of polyvalent ions adsorbed on negatively charged liposomes are found combining measurements of conductivity and electrophoresis. At a rather low surface charge and high adsorbability of polyvalent cations, the diffuse-layer charge can be very small in comparison with the Stern-layer charge, which can predominate in surface conductivity and provide information about the diffusitivity of adsorbed ions if it is not small. An efficient and simple method for the discrimination between small and large surface diffusitivities of adsorbed ions based on the determination of bot...read more
Citations
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Journal ArticleDOI
Overcharging in colloids: beyond the Poisson-Boltzmann approach.
Manuel Quesada-Pérez,Enrique González-Tovar,Enrique González-Tovar,Alberto Martín-Molina,Marcelo Lozada-Cassou,Roque Hidalgo-Alvarez +5 more
TL;DR: These novel approaches, which are mostly computer simulations and approximate integral equation theories based on the so-called primitive model, have scarcely been applied in practice, and a critical survey on the relevance of ion size correlation in real systems is included.
Journal ArticleDOI
Lyotropic sequences in colloid stability revisited
TL;DR: In this article, a review of the properties of simple ions at water-solid interfaces is presented, showing that their Gibbs energies are of the order of a few kT per pair, and are entropically determined.
Journal ArticleDOI
Ion size correlations and charge reversal in real colloids
Manuel Quesada-Pérez,Enrique González-Tovar,Enrique González-Tovar,Alberto Martín-Molina,Marcelo Lozada-Cassou,Roque Hidalgo-Alvarez +5 more
TL;DR: In this article, a critical survey on the relevance of ion size correlations in real colloidal systems (focused mainly on solutions with multivalent counterions) is presented, where a sophisticated electrophoresis theory is applied to analyze experimental data, which is also compared with predictions of the classical approach.
Journal ArticleDOI
Simulation of electric double layers undergoing charge inversion: mixtures of mono- and multivalent ions.
TL;DR: The electric double layer of a charged plane in the presence of mixtures of 1:1 and 3:1 electrolytes has been investigated through Monte Carlo simulations using a nonrestrictive primitive model of EDL and results are in agreement with the behavior found experimentally for some model colloids with increasing the concentration of monovalent salt in the absence of trivalent ions.
Journal ArticleDOI
Electric double layers with electrolyte mixtures: integral equations theories and simulations.
TL;DR: Results from the Hyper-Netted-Chain/Mean-Spherical-Approximation (HNC/MSA) theory are compared with Monte Carlo (MC) simulations and a qualitative agreement between the results obtained from the theory and MC simulations is found.
References
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Book
Foundations of Colloid Science
TL;DR: The structure of concentrated dispersions thin films Emulsions Microemulsions Rheology of colloidal dispersions and their properties are described in detail in this paper, with a focus on statistical mechanics of fluids.
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A theory of the low-frequency dielectric dispersion of colloidal particles in electrolyte solution1,2
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Electrophoretic Mobility of Soft Particles
TL;DR: This theory unites two different electrophoresis theories for rigid colloidal spherical particles and for spherical polyelectrolytes, and an example is given of the analysis of electrophoretic mobility data on hydrogel-layer-coated latex particles.