The Ohm Law as an Alternative for the Entropy Origin Nonlinearities in Conductivity of Dilute Colloidal Polyelectrolytes

Ioulia Chikina (1) , Valeri Shikin (2) , Andrey Varlamov (3)

1 LIONS - Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire
2 ISSP - Osipyan Institute of Solid State Physics
3 SPIN-CNR [Rome]

We discuss the peculiarities of the Ohm law in dilute polyelectrolytes containing a relatively low concentration n of multiply charged colloidal particles. It is demonstrated that in these conditions, the effective conductivity of polyelectrolyte is the linear function of n. This happens due to the change of the electric field in the polyelectrolyte under the effect of colloidal particle polarization. The proposed theory explains the recent experimental findings and presents the alternative to mean spherical approximation which predicts the nonlinear I-V characteristics of dilute colloidal polyelectrolytes due to entropy changes.

Mots clés: Polyelectrolytes; Ohm law; Colloids

Domaines: Matériaux; Chimie théorique et/ou physique; Science des matériaux [cond-mat.mtrl-sci]

Ioulia Chikina, Valeri Shikin, Andrey Varlamov. The Ohm Law as an Alternative for the Entropy Origin Nonlinearities in Conductivity of Dilute Colloidal Polyelectrolytes. Entropy, 2020, 22 (2), pp.225. ⟨10.3390/e22020225⟩. ⟨cea-02488857⟩