Electric response of cells containing ferrofluid particles

Autor(es)

Antonova, A. M. ^{[1, 2, 3]} ; Barbero, G. ^{[1, 2]} ; Batalioto, F. ^[4] ; Neto, A. M. Figueiredo ^[4] ; Parekh, K. ^[5]

Afiliação do(s) autor(es)

^[1] Natl Res Nucl Univ MEPhI, Moscow Engn Phys Inst, Kashirskoye Shosse 31, Moscow 115409 - Russia

^[2] Politecn Torino, Dipartimento Sci Applicata, Corso Duca Abruzzi 24, I-10129 Turin - Italy

^[3] Russian Acad Sci, Sci Res Inst Syst Anal, Nakhimovsky Ave 36, 1, Moscow 117218 - Russia

^[4] Univ Sao Paulo, Inst Fis, POB 66318, BR-05389970 Sao Paulo, SP - Brazil

^[5] Charotar Univ Sci & Technol, Dr KC Patel R&D Ctr, Changa 388421, Gujarat - India

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 856, JAN 1 2020.
• Citações Web of Science: 0

Resumo

The Poisson-Nernst-Planck model for electrolytic solutions is generalized to take into account the difference in the diffusion coefficients and in the electric charge of the ions dissolved in an insulating liquid. The electric impedance of the cell is evaluated by considering the case in which the electric charge transfer from the cell to the external circuit is proportional to the surface electric field. An analytical expression for the electric impedance of the cell is derived. The model is used to interpret experimental data relevant to cell of kerosene doped with ferrofluid particles. We show that the impedance spectroscopy data can be well interpreted by the proposed model. An estimation of the electric conductivity of the system kerosene based ferrofluid is reported and compared with the value obtained by means of the analysis based on equivalent electric circuits. A few considerations on the applicability of Debye's model with a dc conductivity to our data are reported. (AU)

• Processo FAPESP: 08/57685-7 - Instituto Nacional de Ciência e Tecnologia de Fluídos Complexos
• Beneficiário: Antonio Martins Figueiredo Neto
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 11/13616-4 - Propriedades ópticas e estruturais de elastômeros e fluidos complexos de interesse biológico
• Beneficiário: Antonio Martins Figueiredo Neto
• Modalidade de apoio: Auxílio à Pesquisa - Temático