Ion size effects on the electric double layer of a spherical particle in a realistic salt-free concentrated suspension

Details Ion size effects on the electric double layer of a spherical particle in a realistic salt-free concentrated suspension Ion size effects on the electric double layer of a spherical particle in a realistic salt-free concentrated suspension

2011-05-05

arxiv.org/abs/1105.0999v1

Phys. Chem. Chem. Phys., 2011, 13, 9644-9654

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 7 figures

Scientific paper

10.1039/c1cp20100j

A new modified Poisson-Boltzmann equation accounting for the finite size of the ions valid for realistic salt-free concentrated suspensions has been derived, extending the formalism developed for pure salt-free suspensions [Roa et al., Phys. Chem. Chem. Phys., 2011, 13, 3960-3968] to real experimental conditions. These realistic suspensions include water dissociation ions and those generated by atmospheric carbon dioxide contamination, in addition to the added counterions released by the particles to the solution. The electric potential at the particle surface will be calculated for different ion sizes and compared with classical Poisson-Boltzmann predictions for point-like ions, as a function of particle charge and volume fraction. The realistic predictions turn out to be essential to achieve a closer picture of real salt-free suspensions, and even more important when ionic size effects are incorporated to the electric double layer description. We think that both corrections have to be taken into account when developing new realistic electrokinetic models, and surely will help in the comparison with experiments for low-salt or realistic salt-free systems.

Affiliated with

Also associated with

No associations

Rating

Ion size effects on the electric double layer of a spherical particle in a realistic salt-free concentrated suspension does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ion size effects on the electric double layer of a spherical particle in a realistic salt-free concentrated suspension, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ion size effects on the electric double layer of a spherical particle in a realistic salt-free concentrated suspension will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-690143