Crucial factors governing the electrochemical impedance on protein-modified surfaces

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F21%3A00119677" target="_blank" >RIV/00216224:14740/21:00119677 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0013468621009063?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013468621009063?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.electacta.2021.138616" target="_blank" >10.1016/j.electacta.2021.138616</a>

Result language
angličtina
Original language name
Crucial factors governing the electrochemical impedance on protein-modified surfaces
Original language description
Three different electrode surfaces - two nanoporous and one modified with polyelectrolyte - provided with positively and negatively charged model proteins were studied at different conditions to determine characteristics of electrochemical impedance spectroscopy in biosensing. The impedance response in the presence of [Fe(CN)(6)(4-/3-) was simultaneously influenced by two effects - ionic attraction/repulsion and steric hindrance of protein components. The ionic interactions dominated at low ionic strength and at low concentrations of redox probe. On the other hand, the steric hindrance of immobilized proteins affecting mass transfer towards the electrode gained impact gradually with the increasing ionic strength and with the concentration of the redox-active component. The simultaneous effect of these two variables can lead to confusing results which are often misinterpreted when evaluating results from impedimetric affinity biosensors. (C) 2021 Elsevier Ltd. All rights reserved.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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