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On the ac Measurements of the Electrical Conductivity of Dilute Colloidal Electrolytes
Version 1
: Received: 12 July 2023 / Approved: 12 July 2023 / Online: 13 July 2023 (10:04:03 CEST)
A peer-reviewed article of this Preprint also exists.
Chikina, I.; Nakamae, S.; Varlamov, A. On the ac Measurements of the Electrical Conductivity of Dilute Colloidal Electrolytes. Colloids Interfaces 2023, 7, 58. Chikina, I.; Nakamae, S.; Varlamov, A. On the ac Measurements of the Electrical Conductivity of Dilute Colloidal Electrolytes. Colloids Interfaces 2023, 7, 58.
Abstract
The details of ac-conductivity measurements in a colloidal electrolyte cell with flat control gate electrodes are discussed. The use of impedance diagnostics in studies of transport phenomena in such systems requires caution in the definition of the thickness of the screening accumulation layers that appear along the metal-electrolyte interfaces. The value of this characteristic length λ0 critically depends on the volume fraction ϕ⊙ of colloidal particles in the bulk of electrolyte. Accounting for the dependence λ0(ϕ⊙) makes it possible to consistently explain the large discrepancy in the available experimental data regarding the influence of colloidal fraction on the effective conductivity of the colloidal suspension.
Keywords
Electrolytes; Colloids; Impedance measurements, Accumulation layer
Subject
Physical Sciences, Condensed Matter Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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