Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1999-11-09
Phys. Rev. E 61, 3583 (2000)
Physics
Condensed Matter
Statistical Mechanics
7 pages, 8 ps figures
Scientific paper
10.1103/PhysRevE.61.3583
Diffusion and reaction of initially separated ions A- and B+ in the presence of counter ions A'+ and B'- is studied. The dynamics is described in terms of reaction-diffusion equations obeying local electroneutrality, and the time-evolution of ion-concentrations is determined. We find that, in the absence of reactions, unequal mobility of ions generate nontrivial features in the macroscopically observable concentration profiles. Switching on the reaction (A-) + (B+) -> C leads to the formation of a localized, diffusive reaction front and one finds that the properties of the front (e.g. effective diffusion constant) are affected by the background ions. The consequences of this effect on the formation of Liesegang patterns is discussed.
Racz Zoltan
Unger Tamas
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