Croatica Chemica Acta, Vol. 94 No. 1, 2021.
Original scientific paper
https://doi.org/10.5562/cca3731
An Estimate of a Frequency Characterizing the Electrochemical Stability of a Gold Electrode Modified by MHDA Thiol in Different Ways
Sarah Chaibi
; Physics Department, M’hamed Bouguera University, Boumerdes, Algeria
Mokhtar Zabat
orcid.org/0000-0002-5996-1178
; Physics Department, M’hamed Bouguera University, Boumerdes, Algeria
Toufik Hadjersi
orcid.org/0000-0002-7062-6696
; Research Unit UDTS/CRTSE2, bd Frantz Fanon, Algiers, Algeria
Seddik Elhak Abaidia
; Physics Department, M’hamed Bouguera University, Boumerdes, Algeria
Nadia Zine
; Institut des sciences Analytiques (ISA), Université Claude Bernard, Lyon1,UMR 5280, rue de la Doua,69100 Villeurbanne, Lyon 6, France
Nourdin Yaakoubi
; M.C. Université du Maine –Rue Aristote – 72085 le Mans cedex 9 France
Abelhamid Errachid
; Institut des sciences Analytiques (ISA), Université Claude Bernard, Lyon1,UMR 5280, rue de la Doua,69100 Villeurbanne, Lyon 6, France
Abstract
A theoretical investigation aimed at estimating a characteristic frequency in the medium-low frequency domain in which the impedance response of a given interface measured by electrochemical impedance spectroscopy (EIS) is almost constant, constitutes the basic idea of this work. A theoretical model was subsequently applied to the data resulting from EIS measurements performed on gold electrodes modified by various ways of 16-mercaptohexadecanoic acid (MHDA) thiol functionalization. Analysis of these data revealed a direct relationship between the way the substrate was modified and this characteristic frequency.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Keywords
EIS; MHDA; functionalization; conductivity; dielectric frequency
Hrčak ID:
261179
URI
Publication date:
28.6.2021.
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