scholarly journals Estimation and correction of instrument artefacts in dynamic impedance spectra

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Collins Erinmwingbovo ◽  
Fabio La Mantia
Keyword(s):  
High Frequency ◽  
Impedance Spectra ◽  
Stray Capacitance ◽  
Nickel Hexacyanoferrate ◽  
Time Resolved ◽  
Qualitative And Quantitative ◽  
Physicochemical Processes ◽  
Dynamic Impedance ◽  
Wrong Interpretation ◽  
Estimation And Correction

AbstractDynamic impedance spectroscopy is one of the most powerful techniques in the qualitative and quantitative mechanistic studies of electrochemical systems, as it allows for time-resolved investigation and dissection of various physicochemical processes occurring at different time scales. However, due to high-frequency artefacts connected to the non-ideal behaviour of the instrumental setup, dynamic impedance spectra can lead to wrong interpretation and/or extraction of wrong kinetic parameters. These artefacts arise from the non-ideal behaviour of the voltage and current amplifier (I/E converters) and stray capacitance. In this paper, a method for the estimation and correction of high-frequency artefacts arising from non-ideal behaviour of instrumental setup will be discussed. Using resistors, $$[\hbox {Fe(CN)}_6]^{3-/4-}$$ [ Fe(CN) 6 ] 3 - / 4 - redox couple and nickel hexacyanoferrate nanoparticles, the effect of high-frequency artefacts will be investigated and the extraction of the impedance of the system from the measured dynamic impedance is proposed. It is shown that the correction allows acquiring proper dynamic impedance spectra at frequencies higher than the bandwidth of the potentiostat, and simultaneously acquire high precision cyclic voltammetry.

A Simple Technique for Estimating the Winding Stray Capacitance of High-Frequency Three-Phase Common-Mode Inductors

2019 ◽  
Vol 139 (3) ◽  
pp. 339-347 ◽  
Author(s):  
Shotaro Takahashi ◽  
Satoshi Ogasawara ◽  
Masatsugu Takemoto ◽  
Koji Orikawa ◽  
Michio Tamate
Keyword(s):  
High Frequency ◽  
Simple Technique ◽  
Stray Capacitance ◽  
Common Mode ◽  
Three Phase

scholarly journals Coupled time resolved and high frequency modulated photoluminescence probing surface passivation of highly doped n-type InP samples

2021 ◽  
Vol 129 (21) ◽  
pp. 215305
Author(s):  
Wei Zhao ◽  
Baptiste Bérenguier ◽  
Cendra Rakotoarimanana ◽  
Anne-Marie Gonçalves ◽  
Arnaud Etcheberry ◽  
...  
Keyword(s):  
High Frequency ◽  
Surface Passivation ◽  
Time Resolved

Time-resolved curling-probe measurements of electron density in high frequency pulsed DC discharges

2015 ◽  
Vol 55 (1) ◽  
pp. 016101 ◽  
Author(s):  
Anil Pandey ◽  
Wataru Sakakibara ◽  
Hiroyuki Matsuoka ◽  
Keiji Nakamura ◽  
Hideo Sugai
Keyword(s):  
Electron Density ◽  
High Frequency ◽  
Time Resolved ◽  
Pulsed Dc ◽  
Probe Measurements

Time-resolved magneto-optical imaging of Y1Ba2Cu3O7−δthin films in high-frequency AC current regime

2006 ◽  
Vol 19 (6) ◽  
pp. 667-670 ◽  
Author(s):  
A Lucarelli ◽  
G Lüpke ◽  
T J Haugan ◽  
G A Levin ◽  
P N Barnes
Keyword(s):  
Optical Imaging ◽  
High Frequency ◽  
Time Resolved ◽  
Current Regime ◽  
Ac Current ◽  
High Frequency Ac

scholarly journals Defects characterization in thin films photovoltaics materials by correlated high-frequency modulated and time resolved photoluminescence: An application to Cu(In,Ga)Se2

2019 ◽  
Vol 669 ◽  
pp. 520-524
Author(s):  
Baptiste Bérenguier ◽  
Nicolas Barreau ◽  
Alexandre Jaffre ◽  
Daniel Ory ◽  
Jean-François Guillemoles ◽  
...  
Keyword(s):  
Thin Films ◽  
High Frequency ◽  
Time Resolved ◽  
Time Resolved Photoluminescence

scholarly journals Determination and correction of aberrations in full field OCT using phase gradient autofocus by maximizing the likelihood function

2020 ◽  
Author(s):  
Vasily Matkivsky ◽  
Alexander Moiseev ◽  
Pavel Shilyagin ◽  
Alexander Rodionov ◽  
Hendrik Spahr ◽  
...  
Keyword(s):  
High Frequency ◽  
Likelihood Function ◽  
Synthetic Aperture ◽  
Numerical Estimation ◽  
Optical Aberrations ◽  
Phase Gradient ◽  
Full Field ◽  
Fundus Imaging ◽  
Spatial Frequencies ◽  
Estimation And Correction

A method for numerical estimation and correction of aberrations of the eye in fundus imaging with optical coherence tomography (OCT) is presented. Aberrations are determined statistically by using the estimate based on likelihood function maximization. The method can be considered as an extension of the phase gradient autofocusing algorithm in synthetic aperture radar imaging to 2D optical aberrations correction. The efficiency of the proposed method has been demonstrated in OCT fundus imaging with 6λ aberrations. After correction, single photoreceptors were resolved. It is also shown that wavefront distortions with high spatial frequencies can be determined and corrected.Graphical Abstract for Table of Contents[Text. This work is dedicated to development a method for numerical estimation and correction of aberrations of the eye in fundus imaging with OCT. Aberration evaluation is performed statistically by using estimate based on likelihood function maximization. The efficiency of the proposed method has been demonstrated in OCT fundus imaging with 6λ aberrations. It has been shown that spatial high-frequency wavefront distortions can be determined]

High frequency impedance spectra on the chromium dioxide thin film

2001 ◽  
Vol 89 (11) ◽  
pp. 7702-7704 ◽  
Author(s):  
C. M. Fu ◽  
C. J. Lai ◽  
J. S. Wu ◽  
J. C. A. Huang ◽  
C.-C. Wu ◽  
...  
Keyword(s):  
Thin Film ◽  
High Frequency ◽  
Chromium Dioxide ◽  
Impedance Spectra
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