Modular theory for DC-biased electrochemical impedance response of supercapacitor

2020 ◽  
Vol 473 ◽  
pp. 228467 ◽  
Author(s):  
Gaurav Kumar Mishra ◽  
Rama Kant
Keyword(s):  
Electrochemical Impedance ◽  
Modular Theory ◽  
Impedance Response

The Role of Hydroxide in the Electrochemical Impedance Response of Passive Films in Corrosion Environments

2006 ◽  
Vol 153 (3) ◽  
pp. B101 ◽  
Author(s):  
Román Cabrera-Sierra ◽  
M. A. Pech-Canul ◽  
Ignacio González
Keyword(s):  
Electrochemical Impedance ◽  
Passive Films ◽  
Impedance Response

scholarly journals An Enzymatic Multiplexed Impedimetric Sensor Based on α-MnO2/GQD Nano-Composite for the Detection of Diabetes and Diabetic Foot Ulcer Using Micro-Fluidic Platform

Chemosensors ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 339
Author(s):  
Ashish Mathur ◽  
Hari Chandra Nayak ◽  
Shailendra Rajput ◽  
Souradeep Roy ◽  
Shalini Nagabooshanam ◽  
...  
Keyword(s):  
Diabetic Foot ◽  
Electrochemical Impedance ◽  
Glucose Monitoring ◽  
Foot Ulcer ◽  
Diabetic Foot Ulcer ◽  
Sample Volume ◽  
Internal Organs ◽  
Nano Composite ◽  
Impedance Response ◽  
Device Applications

Diabetes is widely considered as a silent killer which affects the internal organs and ultimately has drastic impacts on our day-to-day activities. One of the fatal outcomes of diabetes is diabetic foot ulcer (DFU); which, when becomes chronic, may lead to amputation. The incorporation of nanotechnology in developing bio-sensors enables the detection of desired biomarkers, which in our study are glucose and L-tyrosine; which gets elevated in patients suffering from diabetes and DFUs, respectively. Herein, we report the development of an enzymatic impedimetric sensor for the multi-detection of these biomarkers using an electrochemical paper-based analytical device (µ-EPADs). The structure consists of two working electrodes and a counter electrode. One working electrode is modified with α-MnO2-GQD/tyrosinase hybrid to aid L-tyrosine detection, while the other electrode is coated with α-MnO2-GQD/glucose oxidase hybrid for glucose monitoring. Electrochemical impedance spectroscopy has been employed for the quantification of glucose and L-tyrosine, within a concentration range of 50–800 mg/dL and 1–500 µmol/L, respectively, using a sample volume of approximately 200 µL. The impedance response exhibited a linear relationship over the analyte concentration range with detection limits of ~58 mg/dL and ~0.3 µmol/L for glucose and tyrosine respectively, with shelf life ~1 month. The sensing strategy was also translated to Arduino-based device applications by interfacing the µ-EPADs with miniaturized electronics.

Development of Printed-Type Corrosion Monitoring Sensor and Analysis of Electrochemical Impedance Response

2018 ◽  
Vol 165 (11) ◽  
pp. C743-C748 ◽  
Author(s):  
Akihiro Aiba ◽  
Naoto Fujii ◽  
Yoshinao Hoshi ◽  
Isao Shitanda ◽  
Masayuki Itagaki
Keyword(s):  
Electrochemical Impedance ◽  
Corrosion Monitoring ◽  
Impedance Response

Correlation of the nanostructure of the anodic layers fabricated on Ti13Nb13Zr with the electrochemical impedance response

2015 ◽  
Vol 94 ◽  
pp. 61-69 ◽  
Author(s):  
J.M. Hernández-López ◽  
A. Conde ◽  
J. de Damborenea ◽  
M.A. Arenas
Keyword(s):  
Electrochemical Impedance ◽  
Impedance Response

Characterization of Isothermally Oxidized ZrO2-8wt.%Y2O3 Thermal Barrier Coatings by Electrochemical Impedance Spectroscopy

2005 ◽  
Vol 486-487 ◽  
pp. 145-148
Author(s):  
Jai Won Byeon ◽  
B. Jayaraj ◽  
Yong Ho Sohn
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Thermal Exposure ◽  
Thermally Grown Oxide ◽  
Initial Increase ◽  
Thermal Barrier ◽  
Isothermal Exposure ◽  
Impedance Response ◽  
Subsequent Decrease

Electrochemical impedance spectroscopy was employed to examine ZrO2-8wt.%Y2O3 (yttria stabilized zirconia, YSZ) thermal barrier coating (TBC) as a function of isothermal exposure time at 1121°C. Electrochemical impedance response (resistance and capacitance of YSZ and thermally grown oxide (TGO)) of TBC specimens was analyzed with an alternative current equivalent circuit based on the multi-layered micro-constituents of TBC, and the impedance response was correlated with microstructural changes attributed to isothermal oxidation. The resistance of YSZ was observed to increase initially and then decrease with thermal exposure. The initial increase was related to the high temperature sintering of YSZ, and the subsequent decrease was discussed in terms of microcrack initiation and electrolyte penetration. The TGO thickness was linearly correlated to the capacitance of TGO.

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