Electrochemical characterization of commercial and home-made
screen-printed carbon electrodes
Morrin, Aoife, Killard, Anthony J. and Smyth, Malcolm R.
(2003)
Electrochemical characterization of commercial and home-made
screen-printed carbon electrodes.
Analytical Letters, 36
(9).
pp. 2021-2039.
ISSN 0003-2719
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.
Metadata
Item Type:
Article (Published)
Refereed:
Yes
Uncontrolled Keywords:
screen-printed electrode; cyclic voltammetry; linear
sweep voltammetry; amperometry; charge transfer;