Investigation of the electroreduction of silver sulfite complexes by means of electrochemical FFT impedance spectroscopy

Valiūnienė, Aušra; Baltrūnas, G.; Valiūnas, Raimondas; Popkirov, G.

doi:10.1016/j.jhazmat.2010.04.023

Cited by 20 publications

(9 citation statements)

References 21 publications

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“…It was positioned in several different distances from immobilized yeast cells and electrochemical impedance spectra were registered. In time based experiments EI spectra were registered using impedance spectrometer EIS‐128/16 developed and designed in University of Kiel (Kiel, Germany) with fast Fourier transform (FFT) function, which enables registration of whole electrochemical impedance spectrum within 1.3 s when applying alternating current in the range between 50 kHz–1.5 Hz . Conventional EIS measurements were performed using potentiostat/galvanostat Autolab PGSTAT 30 that registers an EIS spectrum in the same frequency range of 50 kHz–1.5 Hz, in this case the collection of EIS spectra lasted for 8 min.…”

Section: Methodsmentioning

confidence: 99%

“…However, the main disadvantage of combined SECM and conventional EIS techniques (SEIM technique) is very low mapping rate of SEIM, therefore, this method is not well suitable for the investigation of electrochemically active interphases with rapidly changing properties, e. g. samples based on living cells. Therefore, seeking advanced application of SEIM for the investigation of biological objects, in our previous researches we have resolved this disadvantage by applying fast Fourier transform based EIS technique (FFT‐EIS) , which allows reducing the duration of EIS signal registration by 5–20 times when compared to duration required for conventional EIS equipment. Recently it was demonstrated that FFT‐EIS can be applied in SECM measurements (FFT‐SEIM) for the fast/localized registration of EIS spectra at several distances from conducting and non‐conducting surface in the presence of a redox‐couple and in redox‐probe‐free mode .…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Active and Inactivated Yeast Cells by Scanning Electrochemical Impedance Microscopy

et al. 2019

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Scanning electrochemical microscopy (SECM), electrochemical impedance spectroscopy (EIS) and scanning electrochemical impedance microscopy (SEIM) were used to investigate electrochemical activity of active and inactivated yeast Saccharomyces cerevisiae cells. SEIM experiment was performed using a unique electrochemical impedance spectrometer with a fast Fourier transform (FFT‐EIS) function, which enabled simultaneously perturb/evaluate electrochemical system at 50 frequencies. This allowed very quick observing the differences between impedance spectra, which were taken every few seconds. Therefore, we were able to apply SEIM for relatively fast determination of electrochemical impedance dependence on the distance between ultramicroelectrode (UME) and surface modified by immobilized yeast cells. It was determined that electrochemical activity and ‘breathing’ (a consumption of dissolved oxygen) of yeast can be electrochemically observed when the distance between UME and surface of yeast cells is in the range from 0 μm to 25 μm. Therefore, 25 μm is the maximum distance suitable for efficient investigation of yeast cell activity when experiments are performed in FFT‐SEIM mode. Charge transfer resistance of active and inactivated yeast cells was determined using EIS. It was calculated that charge transfer resistance of active yeast cells is 1.5 times lower than that of inactivated yeast cells. Lipophilic vitamin K3 (Vit‐K3) and hydrophilic vitamin K1 (Vit‐K1) were mixtured and used as redox mediators for charge transfer from yeast cells.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Active and Inactivated Yeast Cells by Scanning Electrochemical Impedance Microscopy

et al. 2019

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“…The coatings are degraded or delaminated by corrosion reactions at metal-coating interfaces, which changes their circuit parameters, such as coating resistance and coating capacitance. The coating such as lithium ion batteries [51,52], corrosion studies [53], materials [54,55], freezing processes of crops [56], and gene detection [57]; however, no reports of capacitive coupling have been published. In this study, we demonstrate a new short-time capacitive-coupling IS based on the following ideas:…”

Section: Introductionmentioning

confidence: 99%

Capacitive-Coupling Impedance Spectroscopy Using a Non-Sinusoidal Oscillator and Discrete-Time Fourier Transform: An Introductory Study

Yamaguchi

Ueno

2020

Sensors

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In this study, we propose a new short-time impedance spectroscopy method with the following three features: (1) A frequency spectrum of complex impedance for the measured object can be obtained even when the measuring electrodes are capacitively coupled with the object and the precise capacitance of the coupling is unknown; (2) the spectrum can be obtained from only one cycle of the non-sinusoidal oscillation waveform without sweeping the oscillation frequency; and (3) a front-end measuring circuit can be built, simply and cheaply, without the need for a digital-to-analog (D-A) converter to synthesize elaborate waveforms comprising multiple frequencies. We built the measurement circuit using the proposed method and then measured the complex impedance spectra of 18 resistive elements connected in series with one of three respective capacitive couplings. With this method, each element’s resistance and each coupling’s capacitance were estimated independently and compared with their nominal values. When the coupling capacitance was set to 10 nF or 1.0 nF, estimated errors for the resistive elements in the range of 2.0–10.0 kΩ were less than 5%.

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“…8 Despite the high reliability of the cyanide plating process, its excellent throwing power and the high quality of the deposits that can obtained by this approach, the use of this type of bath is progressively declining owing to the competition of systematically improved CN 2 -free chemistries. In fact, intensive studies of CN 2 -free electrolytes have been in progress over the last few decades; much of this work has been centred on the following ligands: ammonia with EDTA, 9 citrate, 10 ethylamine, 11 ferrocyanide-thiocyanate, 12,13 iodide, 14 methanesulfonate, 15,16 sulphite, 17,18 tartrate, 19 thiocyanate with ammonia, 20 thiosulfate, [21][22][23][24][25] thiourea, 26,27 uracil. 28 Some workers 10,28 claim to have achieved the capability of plating thick, mirror-bright silver from CN 2 -free electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Potential-dependent reactivity of adsorbed cyanide during the electrodeposition of silver from cyanocomplexes: a study based onin-situsurface-enhanced Raman spectroscopy

Caramia

Bozzini

2014

Transactions of the IMF

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This paper reports on the reactivity of cyanide ligands released from Ag(I) cyanocomplexes during electrodeposition at very negative potentials. The study is based on in-situ surface-enhanced Raman spectroscopy (SERS) measurements performed during Ag electrodeposition from H 2 O and D 2 O based-electrolytes in order to pinpoint isotopic shifts. The investigation is complemented by electrochemical measurements -electrochemical impedance spectrometry (EIS) and cyclic voltammetry (CV) -as well as by SEM micrography. Surface-enhanced Raman spectroscopy spectroscopy disclosed details of the cathodic reactivity of adsorbed cyanide yielding amine that are typical of very negative polarisations and had not been observed in previous studies. The formation of cathodic films resulting from cyanide reactivity and giving rise to cathodic passivation and the cathodic reactivation corresponding to the increase in H . formation rate at the most negative investigated potentials have also been followed by potential-dependent EIS. The dependence of Ag electrodeposit morphology on cathodic potential correlates straightforwardly with the secondary inhibition scenario identified by SERS, CV and EIS.

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Investigation of the electroreduction of silver sulfite complexes by means of electrochemical FFT impedance spectroscopy

Cited by 20 publications

References 21 publications

Investigation of Active and Inactivated Yeast Cells by Scanning Electrochemical Impedance Microscopy

Investigation of Active and Inactivated Yeast Cells by Scanning Electrochemical Impedance Microscopy

Capacitive-Coupling Impedance Spectroscopy Using a Non-Sinusoidal Oscillator and Discrete-Time Fourier Transform: An Introductory Study

Potential-dependent reactivity of adsorbed cyanide during the electrodeposition of silver from cyanocomplexes: a study based onin-situsurface-enhanced Raman spectroscopy

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