NDLI: Electrochemistry and detection of dopamine at a poly(3,4-ethylenedioxythiophene) electrode modified with ferrocene and cobaltocene

Content Provider	Springer Nature Link
Author	Atta, Nada F. Galal, Ahmed Ali, Shimaa M. Hassan, Samar H.
Copyright Year	2015
Abstract	Poly(3,4-ethylenedioxythiophene) (PEDOT) modified with ferrocene carboxylic acid (FC1), ferrocene (FC2), and cobaltocene (CC) is introduced as a sensor electrode. FC or CC was “sandwiched” between two layers of PEDOT in the presence of sodium dodecyl sulfate (PEDOT/mediator/PEDOT…SDS). The composite electrodes were evaluated for the electrocatalytic oxidation of dopamine (DA). The FC1 mediator showed the highest rate for electron transfer and enhanced electrocatalytic activity. This is due to the inclusion of the ferrocenium ion and the polar substituted –COOH group in the matrix which increases the electronic conduction of the film. SDS enhanced the preconcentration/accumulation of DA ions at the surface that resulted in enhanced detection. Detection limit in human urine was 0.069 μmol L$^{−1}$ in the linear dynamic range of 6–300 μmol L$^{−1}$, with satisfying recovery results. The PEDOT/FC1/PEDOT…SDS composite was used for simultaneous determination of dopamine in the presence of ascorbic acid (AA) and uric acid (UA).
Starting Page	2371
Ending Page	2382
Page Count	12
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	21
Issue Number	8
e-ISSN	18620760
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-04-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	PEDOT Dopamine Ferrocene Mediator Sodium dodecyl sulfate Electrochemistry Renewable and Green Energy Optical and Electronic Materials Condensed Matter Physics Energy Storage
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Materials Science Chemical Engineering

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