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001     150206
005     20240619091110.0
024 7 _ |a 10.1039/c3nr03818a
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024 7 _ |a 2040-3364
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024 7 _ |a 2040-3372
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024 7 _ |a 2128/5779
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037 _ _ |a FZJ-2014-00285
082 _ _ |a 600
100 1 _ |a Hüske, Martin
|0 P:(DE-Juel1)128689
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245 _ _ |a Redox cycling in nanoporous electrochemical devices
260 _ _ |a Cambridge
|c 2014
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336 7 _ |a Journal Article
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500 _ _ |3 POF3_Assignment on 2016-02-29
520 _ _ |a 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.
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700 1 _ |a Stockmann, Regina
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700 1 _ |a Offenhäusser, Andreas
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700 1 _ |a Wolfrum, Bernhard
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773 _ _ |a 10.1039/c3nr03818a
|g Vol. 6, no. 1, p. 589 -
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|t Nanoscale
|v 6
|y 2014
|x 2040-3372
856 4 _ |u http://pubs.rsc.org/en/content/articlehtml/2014/nr/c3nr03818a
856 4 _ |u https://juser.fz-juelich.de/record/150206/files/FZJ-2014-00285.pdf
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