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@ARTICLE{Ermolenko:912398,
author = {Ermolenko, Yuri E. and Offenhäusser, Andreas and Mourzina,
Youlia},
title = {{S}ynthesizing {E}lectrodes {I}nto {E}lectrochemical
{S}ensor {S}ystems},
journal = {Frontiers in Chemistry},
volume = {9},
issn = {2296-2646},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {FZJ-2022-05583},
pages = {641674},
year = {2021},
abstract = {Electrochemical sensors that can determine single/multiple
analytes remain a key challenge in miniaturized analytical
systems and devices. In this study, we present in situ
synthesis and modification of gold nanodendrite electrodes
to create an electrochemical system for the analysis of
hydrogen peroxide. The sensor system consisted of the
reference and counter electrodes as well as the working
electrode. Electrochemical reduction of graphene oxide,
ErGO, on the thin-film gold and gold nanodendrite working
electrodes was used to achieve an efficient sensor interface
for the adsorption of a biomimetic electrocatalytic sensor
material, Mn(III) meso-tetra(N-methyl-4-pyridyl) porphyrin
complex, with as high as 10–10 mol cm−2 surface
coverage. The sensor system demonstrated a detection limit
of 0.3 µM H2O2 in the presence of oxygen. Electrochemical
determination of hydrogen peroxide in plant material in the
concentration range from 0.09 to 0.4 µmol (gFW)−1 using
the electrochemical sensor system was shown as well as in
vivo real-time monitoring of the hydrogen peroxide dynamics
as a sign of abiotic stress (intense sunlight). Results of
the electrochemical determination were in good agreement
with the results of biochemical analysis with the
spectrophotometric detection. We anticipate that this method
can be extended for the synthesis and integration of
multisensor arrays in analytical microsystems and devices
for the quantification and real-time in vivo monitoring of
other analytes and biomarkers.},
cin = {IBI-3},
ddc = {540},
cid = {I:(DE-Juel1)IBI-3-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
pubmed = {33869143},
UT = {WOS:000639815200001},
doi = {10.3389/fchem.2021.641674},
url = {https://juser.fz-juelich.de/record/912398},
}