guest ::
| Home > Workflow collections > Public records > Redox cycling in nanoporous electrochemical devices |
| Home > Workflow collections > Public records > Redox cycling in nanoporous electrochemical devices |
| Journal Article | FZJ-2014-00285 |
; ; ;
2014
RSC Publ.
Cambridge
This record in other databases: 
Please use a persistent id in citations: http://hdl.handle.net/2128/5779 doi:10.1039/c3nr03818a
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.
; 
; Current Contents - Life Sciences ; JCR ; NCBI Molecular Biology Database ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
|
The record appears in these collections: |
PDF
Fulltext