Showing papers by "Aoife Morrin published in 2003"
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TL;DR: Wang et al. as mentioned in this paper compared the electroactivity of both commercial electrodes and fabricated in-house carbon strip electrodes in order to find the electrode most suitable for amperometric measurements.
Abstract: Screen-printing technology is widely used for the mass-production of
disposable electrochemical sensors. The practical utility of carbon
screen-printed electrodes has been exploited, despite the fact that
little is known about the nature of the electrode reactions.
(Wang, J.; Pedrero, M.; Sakslumd, H.; Hammerich, O.; Pingarron, J.
Electrochemical activation of screenprinted carbon strips. The
Analyst 1996, 121 (3), 345–350). Given the complexity of carbon
electrodesin general, and differences in the composition of commercial
carbon inks, the question arises as to how such differences and
complexity affect their electrochemical reactivity. The aim of this work wasto compare the electroactivity of both commercial electrodesand
electrodes fabricated in-house from various commercial
inks, in order to find the electrode most suited to amperometric
sensor work. Methods of analysis include cyclic voltammetry,
amperometry and linear sweep voltammetry. It was found that the
commercial working electrodeswere not suited to the high current
work of interest, due to their poor charge transfer properties. The
in-house electrode had less resistive properties, and was more suited
for high current amperometric sensing. Utilizing this electrode
configuration, an optimal carbon paste was chosen for the working
electrode.
98 citations
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TL;DR: This study presents the use of complementary colorimetric and amperometric techniques to measure the quantity of protein or enzyme immobilised onto a carbon paste electrode modified with a layer of electrodeposited polyaniline.
42 citations