Excluded volume effect and orientational ordering near charged surface in solution of ions and Langevin dipoles.
The influence of a finite volume of ions and orientational ordering of water Langevin dipoles on the dielectric permittivity profile in the vicinity of charged surface is studied theoretically via a numerical solution of the modified Poisson-Boltzmann equation. It is shown that the dielectric permittivity profile close to the charged surface is mainly determined by two mechanisms; specifically, the depletion of dipoles at the charged surface due to accumulated counterions and the increased orientational ordering of the water dipoles.
Iglic
Ales
A
Laboratory of Biophysics, Faculty of Electrical Engineering, University of Ljubljana, Trzaska 25, SI-1000 Ljubljana, Slovenia. ales.iglic@fe.uni-lj.si
Gongadze
Ekaterina
E
Bohinc
Klemen
K
D000465:Algorithms; D004563:Electrochemistry; D004573:Electrolytes / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008956:Models, Chemical; D016012:Poisson Distribution; D012996:Solutions / Q000737:chemistry; D055672:Static Electricity; D014867:Water / Q000737:chemistry*
D004573:Electrolytes; D007477:Ions; D012996:Solutions; D014867:Water