Regensburg 2007 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: POSTER: Colloids and Nanoparticles
CPP 9.11: Poster
Montag, 26. März 2007, 16:00–18:00, Poster B
Dependency of colloid overcharge on the salt concentration — •Olaf Lenz1, Marcia Barbosa2, and Christian Holm1 — 1FIAS, Frankfurt am Main, Germany — 2Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
We have performed coarse-grained MD simulations of a highly charged colloid in a solution of 3:1 and additional 1:1 salt. The dependency of the colloid's overcharge on the concentration of the additional 1:1 salt has been studied. Depending on the colloid's characteristics and the concentration of the multivalent ions, a non-monotonic behavior has been found.
We compare these results with the theoretical predictions from a density functional theory by M. Barbosa.