English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The equilibrium electric double layer (EDL) that surrounds the colloidalparticles is determinant for the response of a suspension under a variety ofstatic or alternating external fields. An ideal salt-free suspension iscomposed by the charged colloidal particles and the ionic counterchargereleased by the charging mechanism. The existing macroscopic theoretical modelscan be improved by incorporating different ionic effects usually neglected inprevious mean-field approaches, which are based on the Poisson-Boltzmannequation (PB). The influence of the finite size of the ions seems to be quitepromising because it has been shown to predict phenomena like charge reversal,which has been out of the scope of classical PB approximations. In this work wenumerically obtain the surface electric potential and the counterionsconcentration profiles around a charged particle in a concentrated salt-freesuspension corrected by the finite size of the counterions. The results showthe large importance of such corrections for moderate to high particle chargesat every particle volume fraction, specially, when a region of closest approachof the counterions to the particle surface is considered. We conclude thatfinite ion size considerations are obeyed for the development of newtheoretical models to study nonequilibrium properties in concentrated colloidalsuspensions, particularly the salt-free ones with small and highly chargedparticles.

Electric double layer for spherical particles in salt-free concentrated suspensions including ion size effects