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Dielectric Relaxation in Biological SystemsPhysical Principles, Methods, and Applications$
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Valerica Raicu and Yuri Feldman

Print publication date: 2015

Print ISBN-13: 9780199686513

Published to Oxford Scholarship Online: August 2015

DOI: 10.1093/acprof:oso/9780199686513.001.0001

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Electrode Polarization

Electrode Polarization

(p.140) 2.2 Electrode Polarization
Dielectric Relaxation in Biological Systems

Yuri Feldman

Paul Ben Ishai

Valerică Raicu

Oxford University Press

In this chapter, an overview is presented of the state of the art concerning the fundamental properties of electrode polarization (EP) of interest in the measurement of high conductivity samples and its implications to both dielectric (DS) and impedance spectroscopy (IS). Initially a detailed description of what constitutes EP is provided and the problems that it induces. Then, the chapter reviews some of the more popular models that have been used to describe the physical phenomena behind the formation of the ionic double layer. Following this, the chapter enumerates the common strategies used historically to correct its influence on the measured signals in DS or in IS. Finally, it also reviews recent attempts to employ fractal electrodes to by-pass the effects of EP and to offer some physical explanation as to the limitations of their use.

Keywords:   electrode polarization, electrical double layer, constant phase element, coated electrodes, four-electrode techniques, electrode-less methods

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