Work

Electrical conductivity in kerosene-based ferrofluid under DC potential

Year: 2025

Type: article

Abstract: This study investigates the direct current behavior of a kerosene-based ferrofluid. Experimental data reveal linear current–voltage (I–V) characteristics, measured using slab-shaped cells with platinum electrodes. A polarization voltage of a few millivolts is observed, which is attributed to electric polarization effects. This phenomenon is interpreted through a model based on adsorption processes. The I–V characteristics are explained by the dissociation of surface ligands on the nanoparticles, generating ionic charges responsible for conduction. The dissociation process follows a chemical equilibrium described as A⇌B++C−, governed by dissociation and recombination coefficients consistent with standard kinetic models.

Source: Journal of Applied Physics

DOI: 10.1063/5.0253864

Authors: B. M. Oliveira, F. Batalioto, M. Chand, A. F. C. Campos, G. Barbero, A. M. Figueiredo Neto

Institutions: Universidade de São Paulo, University of Delhi, Universidade de Brasília, Politecnico di Torino

Language: English

Topic: Characterization and Applications of Magnetic Nanoparticles

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,500

Funders: Fundação de Amparo à Pesquisa do Estado de São Paulo, Instituto Nacional de Ciência e Tecnologia de Fluidos Complexos