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Polymer-coated Boron Doped Diamond Optically Transparent Electrodes for Spectroelectrochemical Sensors

: Rusinek, C.A.; Becker, M.F.; Rechenberg, R.; Kaval, N.; Ojo, K.; Heineman, W.R.


Electroanalysis 28 (2016), No.9, pp.2228-2236
ISSN: 1040-0397
ISSN: 1521-4109
Journal Article
Fraunhofer CCD ()

Spectroelectrochemical sensors combine electrochemistry, spectroscopy, and partitioning into a film to provide improved selectivity for the target analyte. The sensor usually consists of an optically transparent electrode (OTE) coated with a charge selective polymer film. The polymer film is chosen to pre-concentrate analyte at the OTE surface to improve the sensitivity and provide selectivity against like charged interferences. OTEs such as Indium Tin Oxide (ITO) have been used extensively for spectroelectrochemical sensors, but little is known about the applicability of such sensors using other OTE materials, such as Boron Doped Diamond (BDD). One distinct advantage of BDD OTEs over ITO OTEs is their significant increase in sensitivity for organic compounds, such as 4-aminophenol and hydroquinone. We have developed absorption and fluorescence-based sensing methods with a BDD OTE coated with a sulfonated ionomer film, Nafion.