2022/11/04 by A. Ciach, Ciach, A., O. Patsahan +1
Chemical Engineering · Physics and Astronomy · #FOS: Physical sciences #Ionic liquids properties and applications #Spectroscopy and Quantum Chemical Studies #Statistical Mechanics (cond-mat.stat-mech) #Thermodynamic properties of mixtures
paper · pdf · doi:10.48550/arxiv.2211.02367
openalex publication_date 2022/11/04 · openalex created_date 2022/11/12 · openalex updated_date 2026/07/28
Recently, underscreening in concentrated electrolytes was discovered in experiments and confirmed in simulations and theory. It was found that the correlation length of the charge-charge correlations, λs, satisfies the scaling relation λs/λD∼ (a/λD)n, where λD is the Debye screening length and a is the ionic diameter. However, different values of n were found in different studies. In this work we solve this puzzle within the mesocopic theory that yielded n=3 in agreement with experiments, but only very high densities of ions were considered [A. Ciach A. and O. Patsahan, \it J.Phys.: Condens. Matter \textbf 33, 37LT01 (2021)]. Here we apply the theory to a broader range of density of ions and find that different values of n in the above scaling can yield a fair approximation for λs/λD for different ranges of a/λD. The experimentally found scaling holds for 2