On the ac Measurements of the Electrical Conductivity of Dilute Colloidal Electrolytes-Reference-Cited by-同舟云学术

On the ac Measurements of the Electrical Conductivity of Dilute Colloidal Electrolytes

Published:2023-09-12 Issue:3 Volume:7 Page:58
ISSN:2504-5377
Container-title:Colloids and Interfaces
language:en
Short-container-title:Colloids and Interfaces

Author:

Chikina Ioulia¹,Nakamae Sawako²,Varlamov Andrey³^ORCID

Affiliation:

1. LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France

2. Service de Physique de l`etat Condensé, SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France

3. CNR-SPIN, Via del Fosso del Cavaliere, 100, 00133 Rome, Italy

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 the 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 the colloidal fraction on the effective conductivity of the colloidal suspension.

Publisher

MDPI AG

Subject

Colloid and Surface Chemistry,Chemistry (miscellaneous)

Link

https://www.mdpi.com/2504-5377/7/3/58/pdf

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