Interaction modes between asymmetrically and oppositely charged rods

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2016
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Physical Review E, Volume 93, issue 2
Abstract
The interaction of oppositely and asymmetrically charged rods in salt - a simple model of (bio)macromolecular assembly - is observed via simulation to exhibit two free energy minima, separated by a repulsive barrier. In contrast to similar minima in the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, the governing mechanism includes electrostatic attraction at large separation, osmotic repulsion at close range, and depletion attraction near contact. A model accounting for ion condensation and excluded volume is shown to be superior to a mean-field treatment in predicting the effect of charge asymmetry on the free-energy profile.
Description
Keywords
colloidal particles, electrostatic interactions, rodlike polyelectrolytes
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Citation
Antila , H S , Van Tassel , P R & Sammalkorpi , M 2016 , ' Interaction modes between asymmetrically and oppositely charged rods ' , Physical Review E , vol. 93 , no. 2 , 022602 . https://doi.org/10.1103/PhysRevE.93.022602