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@ARTICLE{Hske:150206,
author = {Hüske, Martin and Stockmann, Regina and Offenhäusser,
Andreas and Wolfrum, Bernhard},
title = {{R}edox cycling in nanoporous electrochemical devices},
journal = {Nanoscale},
volume = {6},
number = {1},
issn = {2040-3372},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2014-00285},
pages = {589 -598},
year = {2014},
abstract = {Nanoscale redox cycling is a powerful technique for
detecting electrochemically active molecules, based on fast
repetitive oxidation and reduction reactions. An ideal
implementation of redox cycling sensors can be realized by
nanoporous dual-electrode systems in easily accessible and
scalable geometries. Here, we introduce a multi-electrode
array device with highly efficient nanoporous redox cycling
sensors. Each of the sensors holds up to 209[thin space
(1/6-em)]000 well defined nanopores with minimal pore radii
of less than 40 nm and an electrode separation of
[similar]100 nm. We demonstrate the efficiency of the
nanopore array by screening a large concentration range over
three orders of magnitude with area-specific sensitivities
of up to 81.0 mA (cm−2 mM−1) for the redox-active probe
ferrocene dimethanol. Furthermore, due to the specific
geometry of the material, reaction kinetics has a unique
potential-dependent impact on the signal characteristics. As
a result, redox cycling experiments in the nanoporous
structure allow studies on heterogeneous electron transfer
reactions revealing a surprisingly asymmetric transfer
coefficient.},
cin = {ICS-8 / PGI-8 / JARA-FIT},
ddc = {600},
cid = {I:(DE-Juel1)ICS-8-20110106 / I:(DE-Juel1)PGI-8-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {423 - Sensorics and bioinspired systems (POF2-423) / 453 -
Physics of the Cell (POF2-453) / Helmholtz Young
Investigators Group (HGF-YoungInvestigatorsGroup)},
pid = {G:(DE-HGF)POF2-423 / G:(DE-HGF)POF2-453 /
G:(DE-HGF)HGF-YoungInvestigatorsGroup},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000328673000070},
pubmed = {pmid:24247480},
doi = {10.1039/c3nr03818a},
url = {https://juser.fz-juelich.de/record/150206},
}