The system of mobile ions in lattice models: Screening effects, thermodynamic and electrophysical properties
| Autor: | Vyacheslav S. Vikhrenko, Myroslav Holovko, George Bokun, Dung Di Caprio |
|---|---|
| Přispěvatelé: | Institut de Recherche de Chimie Paris (IRCP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Ministère de la Culture (MC), Theory of solutions, Institute for Condensed Matter Physics [Darmstadt] |
| Rok vydání: | 2018 |
| Předmět: |
FOS: Physical sciences
02 engineering and technology 010402 general chemistry 01 natural sciences Capacitance Instability Ion symbols.namesake Square root Electric field Lattice (order) Materials Chemistry Coulomb [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] Physical and Theoretical Chemistry ComputingMilieux_MISCELLANEOUS Spectroscopy Debye length Physics Condensed matter physics 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 3. Good health 0104 chemical sciences Electronic Optical and Magnetic Materials [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Condensed Matter - Other Condensed Matter symbols 0210 nano-technology Other Condensed Matter (cond-mat.other) |
| Zdroj: | Journal of Molecular Liquids Journal of Molecular Liquids, Elsevier, 2018, 270, pp.183-190. ⟨10.1016/j.molliq.2018.03.123⟩ |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2018.03.123 |
| Popis: | The lattice fluid model of the system with short range and long range Coulomb interactions is suggested. In the framework of the collective variables method, the screening of the Coulomb interactions in the bulk is considered. It is shown that the Debye length includes additional concentration dependence inversely proportional to the square root of the mean concentration of vacant sites like what is known at the plane boundary. The Coulomb interaction contribution to the free energy of the system is calculated in the approach close to the mean spherical approximation and is given in an analytical form. The influence of the variation of the crystal field near the system boundary on the structure and characteristics of the electric double layer is investigated. As compared to the system with equal crystal potentials at the lattice sites throughout the system the pronounced difference for the electric capacitance appears at low absolute values of the surface potential and it is more pronounced for negative electric potentials. The capacitance diverges as the potential values at which the electric field tends to zero and attains negative values in regions of the surface potentials depending on their polarity and values of the surface crystal potential. Negative values of the capacitance may indicate the thermodynamic instability of the system that can result from neglecting the short range interaction contribution. Comment: 20 pages, 5 figures |
| Databáze: | OpenAIRE |
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