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SOPOUŠEK, Jakub, Jakub VĚŽNÍK, Josef HOUSER, Petr SKLÁDAL and Karel LACINA. Crucial factors governing the electrochemical impedance on protein-modified surfaces. Electrochimica Acta. OXFORD: Elsevier, 2021, vol. 388, AUG, p. 138616-138622. ISSN 0013-4686. doi:10.1016/j.electacta.2021.138616.
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Basic information
Original name Crucial factors governing the electrochemical impedance on protein-modified surfaces
Authors SOPOUŠEK, Jakub (203 Czech Republic, belonging to the institution), Jakub VĚŽNÍK (203 Czech Republic, belonging to the institution), Josef HOUSER (203 Czech Republic, belonging to the institution), Petr SKLÁDAL (203 Czech Republic, belonging to the institution) and Karel LACINA (203 Czech Republic, guarantor, belonging to the institution).
Edition Electrochimica Acta, OXFORD, Elsevier, 2021, 0013-4686.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10405 Electrochemistry
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
Impact factor Impact factor: 7.336
RIV identification code RIV/00216224:14740/21:00119677
Organization unit Central European Institute of Technology
UT WoS 000670355000003
Keywords in English Electrochemical impedance spectroscopy; Polystyrene nanoparticles; Polyacrylic acid; Bovine serum albumin; Cationized bovine serum albumin; Ionic strength; Ionic charge
Tags CF BIC, CF NANO, rivok
Tags International impact, Reviewed
Changed by Changed by: Mgr. Pavla Foltynová, Ph.D., učo 106624. Changed: 1/3/2022 13:49.
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.
EF19_073/0016943, research and development projectName: Interní grantová agentura Masarykovy univerzity
GJ19-16273Y, research and development projectName: ROS-indukované uvolňování léčiv založené na interakcích ferocenylboronátů
Investor: Czech Science Foundation, ROS-Induced Drug Release Based on Interactions of Ferrocenylboronates
LM2018127, research and development projectName: Česká infrastruktura pro integrativní strukturní biologii (Acronym: CIISB)
Investor: Ministry of Education, Youth and Sports of the CR
LQ1601, research and development projectName: CEITEC 2020 (Acronym: CEITEC2020)
Investor: Ministry of Education, Youth and Sports of the CR
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