Screening Lengths in Ionic Fluids
| Autor: | Andreas Härtel, Alpha A. Lee, Fabian Coupette |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Statistical Mechanics (cond-mat.stat-mech) General Physics and Astronomy Ionic bonding FOS: Physical sciences Near and far field 02 engineering and technology Electrolyte Condensed Matter - Soft Condensed Matter 021001 nanoscience & nanotechnology 01 natural sciences Condensed Matter::Soft Condensed Matter Colloid Molecular dynamics Chemical physics 0103 physical sciences Soft Condensed Matter (cond-mat.soft) Soft matter Limit (mathematics) Thin film Physics::Chemical Physics 010306 general physics 0210 nano-technology Condensed Matter - Statistical Mechanics |
| DOI: | 10.48550/arxiv.1803.10596 |
| Popis: | The decay of correlations in ionic fluids is a classical problem in soft matter physics that underpins applications ranging from controlling colloidal self-assembly to batteries and supercapacitors. The conventional wisdom, based on analyzing a solvent-free electrolyte model, suggests that all correlation functions between species decay with a common decay length in the asymptotic far field limit. Nonetheless, a solvent is present in many electrolyte systems. We show using an analytical theory and molecular dynamics simulations that multiple decay lengths can coexist in the asymptotic limit as well as at intermediate distances once a hard sphere solvent is considered. Our analysis provides an explanation for the recently observed discontinuous change in the structural force across a thin film of ionic liquid-solvent mixtures as the composition is varied, as well as reframes recent debates in the literature about the screening length in concentrated electrolytes. |
| Databáze: | OpenAIRE |
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