TY - JOUR
T1 - Steric effects in electrolytes
T2 - A modified poisson-boltzmann equation
AU - Borukhov, Itamar
AU - Andelman, David
AU - Orland, Henri
PY - 1997/1/1
Y1 - 1997/1/1
N2 - The adsorption of large ions from solution to a charged surface is investigated theoretically. A generalized Poisson-Boltzmann equation which takes into account the finite size of the ions is presented. We obtain analytical expressions for the electrostatic potential and ion concentrations at the surface, leading to a modified Grahame equation. At high surface charge densities the ionic concentration saturates to its maximum value. Our results are in agreement with recent experiments.
AB - The adsorption of large ions from solution to a charged surface is investigated theoretically. A generalized Poisson-Boltzmann equation which takes into account the finite size of the ions is presented. We obtain analytical expressions for the electrostatic potential and ion concentrations at the surface, leading to a modified Grahame equation. At high surface charge densities the ionic concentration saturates to its maximum value. Our results are in agreement with recent experiments.
UR - http://www.scopus.com/inward/record.url?scp=6244273869&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.79.435
DO - 10.1103/PhysRevLett.79.435
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AN - SCOPUS:6244273869
VL - 79
SP - 435
EP - 438
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 3
ER -