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@ARTICLE{Krause:187933,
author = {Krause, Kay J. and Kätelhön, Enno and Lemay, Serge G. and
Compton, Richard G. and Wolfrum, Bernhard},
title = {{S}ensing with nanopores â the influence of asymmetric
blocking on electrochemical redox cycling current},
journal = {The analyst},
volume = {139},
number = {21},
issn = {1364-5528},
address = {Cambridge},
publisher = {Soc.},
reportid = {FZJ-2015-01443},
pages = {5499 - 5503},
year = {2014},
abstract = {Nanoporous redox cycling devices are highly efficient tools
for the electrochemical sensing of redox-active molecules.
By using a redox-active mediator, this concept can be
exploited for the detection of molecular binding events via
blocking of the redox cycling current within the nanopores.
Here, we investigate the influence of different blocking
scenarios inside a nanopore on the resulting redox cycling
current. Our analysis is based on random walk simulations
and finite element calculations. We distinguish between
symmetric and asymmetric pore blocking and show that the
current decrease is more pronounced in the case of
asymmetric blocking reflecting the diffusion-driven pathway
of the redox-active molecules. Using random walk
simulations, we further study the impact of pore blocking in
the frequency domain and identify relevant features of the
power spectral density, which are of particular interest for
sensing applications based on fluctuation analysis.},
cin = {PGI-8 / JARA-FIT},
ddc = {540},
cid = {I:(DE-Juel1)PGI-8-20110106 / $I:(DE-82)080009_20140620$},
pnm = {423 - Sensorics and bioinspired systems (POF2-423)},
pid = {G:(DE-HGF)POF2-423},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000343003700025},
doi = {10.1039/C4AN01401D},
url = {https://juser.fz-juelich.de/record/187933},
}