Investigation of the enhanced signals from cations and dopamine in electrochemical sensors coated with Nafion

Chou, Ju, Ilgen, Terri J., Gordon, Scott, Ranasinghe, Asanga D., McFarland, Eric W., Metiu, Horia and Buratto, Steven K. (2009) Investigation of the enhanced signals from cations and dopamine in electrochemical sensors coated with Nafion. Journal of Electroanalytical Chemistry, 632 1-2: 97-101. doi:10.1016/j.jelechem.2009.04.002


Author Chou, Ju
Ilgen, Terri J.
Gordon, Scott
Ranasinghe, Asanga D.
McFarland, Eric W.
Metiu, Horia
Buratto, Steven K.
Title Investigation of the enhanced signals from cations and dopamine in electrochemical sensors coated with Nafion
Journal name Journal of Electroanalytical Chemistry   Check publisher's open access policy
ISSN 1572-6657
1873-2569
Publication date 2009-07-01
Sub-type Article (original research)
DOI 10.1016/j.jelechem.2009.04.002
Open Access Status
Volume 632
Issue 1-2
Start page 97
End page 101
Total pages 5
Place of publication Lausanne, Switzerland
Publisher Elsevier
Language eng
Abstract An electrochemical sensor for the detection of dopamine (DA) was designed using a modified Nafion membrane on a glassy carbon electrode. The electrochemical signals from dopamine were enhanced more than 10-fold on a Nafion membrane coated electrode relative to a bare electrode. The hypothesis that the origin of the signal enhancement was due to the accumulation of cationic dopamine in the Nafion was tested using Pd ions as an analog which undergo a two electron reduction similar to dopamine. Electroless deposition of palladium was used to deposit palladium on a highly oriented pyrolytic graphite surface with and without the Nafion membrane. Using scanning electron microscopy (SEM) significantly greater deposits of metallic Pd were observed on the Nafion coated surfaces than in the absence of Nafion and energy dispersive X-ray spectroscopy (EDS) confirmed quantitatively greater Pd deposition on the Nafion coated surfaces.
Keyword Dopamine sensor
Electroless deposition
Enhancement of electrochemical signals
Nafion membrane
Palladium nanoparticles
SEM
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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