Charge inversion of colloids in an exactly solvable model

Details Charge inversion of colloids in an exactly solvable model Charge inversion of colloids in an exactly solvable model

2005-11-11

arxiv.org/abs/cond-mat/0511300v2

Europhys. Lett. 76 (6), 1186-1192 (2006)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1209/epl/i2006-10389-8

We study a two-dimensional model for a long cylindrical stiff charged macroion immersed in a charge-asymmetric electrolyte with charge ratio +2/-1. The model is integrable and it allows an exact analytical determination of the effective charge of the macroion, which characterizes the electrostatic potential at large distances (compared to the screening length) from the macroion. At at high coulombic coupling, this model predicts charge inversion: for a highly negatively charged macroion, the effective charge could become positive, indicating an overscreening of the macroion by the divalent counterions. By studying the behavior of the coions and counterions density profiles close to the macroion, we show that the counterion condensation threshold is shifted to a lower value in absolute value. This plays an important role in the charge inversion phenomenon.

Affiliated with

Also associated with

No associations

Rating

Charge inversion of colloids in an exactly solvable model 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 Charge inversion of colloids in an exactly solvable model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge inversion of colloids in an exactly solvable model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-408655