Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2001-04-04
Physica A, VOL. 308, p. 59 (2002)
Physics
Condensed Matter
Soft Condensed Matter
24 pages, 12 (main) figures (28 EPS files). To appear in Physica A
Scientific paper
10.1016/S0378-4371(02)00560-5
We report the coupled effects of macroion charge discretization and counterion valence in the primitive model for spherical colloids. Instead of considering a uniformly charged surface, as it is traditionally done, we consider a more realistic situation where \textit{discrete monovalent microscopic charges} are randomly distributed over the sphere. Monovalent or multivalent counterions ensure global electroneutrality. We use molecular dynamics simulations to study these effects at the ground state and for finite temperature. The ground state analysis concerns the counterion structure and \textit{charge inversion}. Results are discussed in terms of simple analytical models. For finite temperature, strong and weak Coulomb couplings are treated. In this situation of finite temperature, we considered and discussed the phenomena of ionic pairing (pinning) and unpairing (unpinning).
No associations
LandOfFree
Spherical Colloids: Effect of Discrete Macroion Charge Distribution and Counterion Valence 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 Spherical Colloids: Effect of Discrete Macroion Charge Distribution and Counterion Valence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spherical Colloids: Effect of Discrete Macroion Charge Distribution and Counterion Valence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-291803