Particles inside electrolytes with ionspecific interactions, their effective charge distributions, and effective interactions
Abstract
In this work, we explore the statistical physics of colloidal particles that interact with electrolytes via ionspecific interactions. Firstly we study particles interacting weakly with electrolyte using linear response theory. We find that the mean potential around a particle is linearly determined by the effective charge distribution of the particle, which depends both on the bare charge distribution and on ionspecific interactions. We also discuss the effective interaction between two such particles and show that, in the far field regime, it is bilinear in the effective charge distributions of two particles. We subsequently generalize the above results to the more complicated case where particles interact strongly with the electrolyte. Our results indicate that in order to understand the statistical physics of nondilute electrolytes, both ionspecific interactions and ionic correlations have to be addressed in a single unified and consistent framework.
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174196 and 91130012).
 Publication:

Chinese Physics B
 Pub Date:
 October 2016
 DOI:
 10.1088/16741056/25/10/108201
 arXiv:
 arXiv:1602.06014
 Bibcode:
 2016ChPhB..25j8201D
 Keywords:

 Condensed Matter  Soft Condensed Matter;
 Condensed Matter  Statistical Mechanics
 EPrint:
 22 pages, no figures