Deviations from linearity in impedance spectroscopy measurements.

Batalioto, Fernando; Barbero, Giovanni; Figueiredo Neto, Antonio M.; Lelidis, Ioannis

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dc.contributor.author	Batalioto, Fernando
dc.contributor.author	Barbero, Giovanni
dc.contributor.author	Figueiredo Neto, Antonio M.
dc.contributor.author	Lelidis, Ioannis
dc.date.accessioned	2022-06-22T12:35:04Z
dc.date.available	2022-06-22T12:35:04Z
dc.date.issued	2022-06-22T09:35:04Z
dc.identifier.citation	Electrochimica Acta 397 (2021) 139277 - https://doi.org/10.1016/j.electacta.2021.139277
dc.identifier.uri	http://repositorio.uspdigital.usp.br/handle/item/371
dc.description	Tables in text format (.dat). We investigate the electric response of a kerosene cell containing magnetic nanoparticles. The cell is submitted to an external potential difference and its impedance is measured for increasing values of the potential amplitude. The analysis of the experimental data by means of the Kramers-Kronig relations indicates an unexpected deviation from the linear behaviour situated close to the frequency identifying the minimum of the cell’s reactance modulus. We show that this departure from linearity could be related to the imaginary part of the ions’ bulk density when its variation cannot be considered as a small quantity. The analysis is performed in the one-type mobile ions approximation of the Poisson-Nernst-Planck model assuming Ohmic boundary conditions on the electrodes. Fitting the data using linear models gives poor results any time the Kramers-Kronig analysis shows deviations from linearity.
dc.description.sponsorship	MEPhI Academic Excellence Project
dc.description.sponsorship	Conselho Nacional de Desenvolvimento Científico e Tecnológico (INCT/CNPq)
dc.description.sponsorship	Fundação de Amparo à Pesquisa do Estado de São Paulo (INCT/FAPESP)
dc.description.sponsorship	Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (INCT/CAPES)
dc.description.sponsorship	Thematic Project (FAPESP)
dc.publisher	Universidade de São Paulo, Instituto de Física, Grupo de Fluidos Complexos.
dc.title	Deviations from linearity in impedance spectroscopy measurements.
dc.type	Dataset
dc.description.sponsorshipId	02.a03.21.0005
dc.description.sponsorshipId	465259/2014-6
dc.description.sponsorshipId	14/50983-3
dc.description.sponsorshipId	88887.136373/2017-00
dc.description.sponsorshipId	2016/24531-3