Author/Editor | Bohinc, Klemen; Iglič, Aleš; Slivnik, Tomaž; Kralj-Iglič, Veronika | |
Title | Free energy of electric double layer. Effect of ion size | |
Translated title | Prosta energija električne dvojne plasti. Efekt velikosti ionov | |
Type | članek | |
Source | Elektroteh vestn | |
Vol. and No. | Letnik 68, št. 4 | |
Publication year | 2001 | |
Volume | str. 231-5 | |
Language | eng | |
Abstract | An expression for the free energy of an electric double layer is derived. A method of undetermined multipliers is applied within a simple statistical mechanical approach. The electrostatic interactions are described by the mean electrostatic field while the finite size of particles, constituting the electrolyte solution, is considered by the excluded volume effect. The particles in the solution are distributed over a lattice with an adjustable constant. The free energy is derived for any composition of ions and any ion valency allowing the mean electrostatic field to vanish far from the charged plane. | |
Summary | V tem delu izpeljemo izraz za prosto energijo električne dvojne plasti. Uporabimo metodo nedoločenih koeficientov v okviru preprostega statistično mehanskega pristopa. Elektrostatske interakcije opišemo s povprečnim poljem, končno velikost ionov pa s predpostavko, da se prostomine, ki jih zavzemajo posamezni delci, med seboj ne morejo prekrivati. Delci v raztopini so porazdeljeni v mrežo s naštavljivo mrežno konstanto. Izpeljemo prosto energijo za vsako kompozicijo in valenco ionov, ki ustrezajo pogoju, da je elektcično polje daleč od plo*če enako nič. | |
Descriptors | SOLUTIONS IONS PARTICLE SIZE ELECTROSTATICS |