Three-electrode cell set-up electrical equivalent circuit applied to impedance analysis of thin polyaniline film modified electrodes

Horvat-Radošević, Višnja; Kvastek, Krešimir

doi:10.1016/j.jelechem.2009.03.003

Cited by 14 publications

(11 citation statements)

References 38 publications

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“…The monomer was used as received. Similarly to the procedure described before, [35] oxidative polymerization was performed by cycling the potential at a sweep rate, v = 50 mV s -1 , between the negative limit at -0.20 V vs. SCE and positive limit at 1.00 V vs. SCE in the 1 st cycle (corresponding the beginning of aniline oxidation) and at 0.85 V vs. SCE in all subsequent 24 potential cycles ( Figure 1a). Two prominent voltammetric peaks in Figure 1a are characteristic for different oxidation states of PANI and associated with different levels of conductivity.…”

Section: Polyaniline (Pani) Film Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Frequency Response Analysis of a Nonstationary System: Electrochemical Transition of Polyaniline

Košiček¹,

Horvat-Radošević²,

Kvastek³

2018

Croat. Chem. Acta

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In this work, impedance spectra of polyaniline film electrode recorded at some redox transition potentials have been corrected for nonstationarity by application of Stoynov's 4-D method. The procedure consisted from: a) conventional measurements of a series of impedance spectra under strictly same experimental conditions, which are accompanied by monitoring of real operating time intervals for measurement of each particular impedance spectrum of the series, b) determination of functional dependence(s) between iso-frequency impedance values and operating time, and c) calculations of instantaneous IS for the time instant of the beginning of the first IS measurement. Comparison between measured and instantaneous impedance spectra, and also between their individual impedance parameter values pointed toward significant differences in charge transfer and transport resistance values. The results suggest that erroneous (either underestimated or overestimated) charge transfer and transport resistance values will be obtained if measured impedance spectra were not corrected for nonstationarity.

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Section: Polyaniline (Pani) Film Preparationmentioning

confidence: 99%

“…[32][33][34] Moreover, the conventional EIS technique has already been applied for investigation of time changing of polyaniline (PANI) in its partially reduced states. [35,36] . Short EIS measurements were performed, assuming that time change of PANI is slower than duration of the single spectrum measurement.…”

Section: Introductionmentioning

confidence: 99%

Frequency Response Analysis of a Nonstationary System: Electrochemical Transition of Polyaniline

Košiček¹,

Horvat-Radošević²,

Kvastek³

2018

Croat. Chem. Acta

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“…This should be attributed to the fact that the charge transfer process is slower at the electrolyte/metal interface than at the PAni EB Film/metal interface [40][41][42][43].…”

Section: Figurementioning

confidence: 99%

Smart Paint for anodic protection of steel

Silva

Alemán

Ferreira

et al. 2015

Progress in Organic Coatings

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In order to overcome the difficulties associated to the solubility and mechanical integrity of polyaniline (PAni) films, in this work we develop a binder by mixing PAni in the oxidized and undoped state (emeraldine base form) with 4-chloro-3-methylphenol, a plasticizer, and solvent. This binder has been used as a coating alone or combined with a conventional nitrocellulose paint to formulate the called Smart Paint. The characterization of binder films, which are cohesive and self-standing, shows the preservation of PAni properties, indicating that they satisfy the typical characteristics of anticorrosive coatings.Electrochemical assays have been carried out in H 2 SO 4 solution using AISI 1006 steel plates coated with the binder and the Smart Paint. Results indicate that the binder and the Smart Paint promote the passivation of the metal substrate, reflecting their protecting abilities against corrosion.

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“…These studies have culminated in groundbreaking discoveries including: description of the capacitive double layer [30]; actively monitoring corrosion mechanisms [31]; characterization of conductive polymers [32]; the development of DNA, enzyme, and antibody-based label-free biosensors [33]; as well as monitoring cellular morphology [34]- [36].…”

Section: Introduction To Eismentioning

confidence: 99%

From Cellular Cultures to Cellular Spheroids: Is Impedance Spectroscopy a Viable Tool for Monitoring Multicellular Spheroid (MCS) Drug Models?

Alexander

Price

Bhansali

2013

IEEE Rev. Biomed. Eng.

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The use of 3-D multicellular spheroid (MCS) models is increasingly being accepted as a viable means to study cell-cell, cell-matrix and cell-drug interactions. Behavioral differences between traditional monolayer (2-D) cell cultures and more recent 3-D MCS confirm that 3-D MCS more closely model the in vivo environment. However, analyzing the effect of pharmaceutical agents on both monolayer cultures and MCS is very time intensive. This paper reviews the use of electrical impedance spectroscopy (EIS), a label-free whole cell assay technique, as a tool for automated screening of cell drug interactions in MCS models for biologically/physiologically relevant events over long periods of time. EIS calculates the impedance of a sample by applying an AC current through a range of frequencies and measuring the resulting voltage. This review will introduce techniques used in impedance-based analysis of 2-D systems; highlight recently developed impedance-based techniques for analyzing 3-D cell cultures; and discuss applications of 3-D culture impedance monitoring systems.

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Three-electrode cell set-up electrical equivalent circuit applied to impedance analysis of thin polyaniline film modified electrodes

Cited by 14 publications

References 38 publications

Frequency Response Analysis of a Nonstationary System: Electrochemical Transition of Polyaniline

Frequency Response Analysis of a Nonstationary System: Electrochemical Transition of Polyaniline

Smart Paint for anodic protection of steel

From Cellular Cultures to Cellular Spheroids: Is Impedance Spectroscopy a Viable Tool for Monitoring Multicellular Spheroid (MCS) Drug Models?

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