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Impedance spectroscopy of magnetic colloids

Grant number: 16/03488-2
Support type:Research Grants - Visiting Researcher Grant - International
Duration: May 01, 2016 - May 31, 2016
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Antonio Martins Figueiredo Neto
Grantee:Antonio Martins Figueiredo Neto
Visiting researcher: Giovanni Barbero
Visiting researcher institution: Politecnico di Torino, Italy
Home Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:11/13616-4 - Optical and structural properties of elastomers and complex fluids of biological interest, AP.TEM

Abstract

The electric response of a dielectric liquid doped by ferrofluid will be investigated. From the theoretical point of view our goal is the generalization of the Poisson-Nernst-Planck model, based on the continuity equations and on the equation of Poisson with particular attention to the importance of the Einstein-Smolucowski relation, and to the description of the boundary conditions used for the model. From the experimental point of view we plan to analyze the spectra of the real and imaginary parts of the response of the cell at the impedance and dielectric level versus the thickness of the samples, in order to derive information on the bulk and interface contributions. (AU)