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

被引：2
|
作者：
Chikina, Ioulia [1 ]
Nakamae, Sawako [2 ]
Varlamov, Andrey [3 ]
机构：
[1] Univ Paris Saclay, CEA Saclay, CNRS, LIONS NIMBE CEA, F-91191 Gif Sur Yvette, France
[2] CEA Saclay, CNRS, CEA, Serv Phys Letat Condense,SPEC, F-91191 Gif Sur Yvette, France
[3] CNR SPIN, Via Fosso Cavaliere 100, I-00133 Rome, Italy
来源：
COLLOIDS AND INTERFACES | 2023年 / 7卷 / 03期
基金：
欧盟地平线“2020”;
关键词：
electrolytes; colloids; impedance measurements; accumulation layer; PARTICLES;
D O I：
10.3390/colloids7030058
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 lambda 0 critically depends on the volume fraction phi circle dot of colloidal particles in the bulk of the electrolyte. Accounting for the dependence lambda 0(phi circle dot) 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.
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页数：10
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