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Notes and reflections on impedance spectroscopy
(Pharmaceutica Analytica Acta, 2017-04-18)
According to the fundamental theory, the interaction ofelectromagnetic field with matter is well described by Maxwell’sequations [1]. The thing is, if we disturb the matter applying analternant potential difference through ...
Electrochemical impedance study of iron electrodes covered by polypyrrole films electrosynthesized in the presence of AOT
(Elsevier Science, 2008-07-06)
The electrosynthesis of polypyrrole (PPy) onto iron electrodes in the presence of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) solutions is characterized by the formation of a gelatinous material in parallel to the growth ...
Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality
(Pergamon-Elsevier Science Ltd, 2018-03)
In this work, the proper charge density of a microfiltration membrane has been determined by using two different methods. Firstly, the ionic transport of a KCl solution has been investigated by simultaneous measurements ...
Impedance spectroscopy applied to the fast wounding dynamics of an electrical wound-healing assay in mammalian cells
(IOP Publishing, 2015-06-25)
Electrical wound-healing assays are often used as a means to study in vitro cell migration and proliferation. In such analysis, a cell monolayer that sits on a small electrode is electrically wounded and its spectral ...
Carrier conduction mechanisms of mesoporous titania thin films assessed by impedance spectroscopy
(Elsevier Science, 2019-07)
The electrical characterization of porous titania thin films remain a subject of study due to the material interest in widespread device applications. Highly ordered mesoporous titania thin films prepared by sol-gel method ...
Impedance spectroscopy characterization of GaAs nanowire bundles grown by metal-catalyzed molecular beam epitaxy
(Elsevier Science Sa, 2010-04)
Vertically aligned GaAs nanowire (NW) bundles grown by gas-source molecular beam epitaxy on an n-doped GaAs substrate by a metal catalysis method and embedded in an insulating matrix (SU8-2) were studied by impedance ...
Study of the n=3 Ruddlesden-Popper phases LnSr3Fe1.5Co1.5O10−δ (Ln = La, Pr, Nd) as oxygen reduction electrodes by impedance spectroscopy
(Elsevier Science, 2018-11)
The polarization resistance (Rp) of the n = 3 Ruddlesden-Popper phases LnSr3Fe1.5Co1.5O10−δ with Ln = La, Nd and Pr has been studied by Electrochemical Impedance Spectroscopy as a function of both temperature and oxygen ...
Conduction mechanisms in SnO2 single-nanowire gas sensors: An impedance spectroscopy study
(Elsevier Science Sa, 2016-10-14)
Results of studies on single and multiple SnO2 nanowire gas sensors with impedance spectroscopy are reported. Equivalent circuit modeling is used to draw fundamental conclusions about the dominant conduction mechanism in ...
Nanostructured ZnO films: A study of molecular influence on transport properties by impedance spectroscopy
(Elsevier Science, 2015-10)
Nanomaterials based on ZnO have been used to build glucose sensors due to its high isoelectric point, which is important when a protein like Glucose Oxidase (GOx) is attached to a surface. It also creates a biologically ...
Assay based on electrical impedance spectroscopy to discriminate between normal and cancerous mammalian cells
(American Physical Society, 2018-03-19)
In this work we present an assay to discriminate between normal and cancerous cells. The method is based on the measurement of electrical impedance spectra of in vitro cell cultures. We developed a protocol consisting on ...