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Elaboration of screen-printed microelectrodes working as generator/collector and their use in a flow cell system

Abstract : A simple and cheap method has been developed to fabricate generator/collector microelectrodes. The elaboration of these electrodes consists in the deposit of consecutive layers of conductive ink and insulator by screen-printing. The two resulting working surfaces (microbands) are situated on the edge of the sensor and are separated by a very thin layer of insulator (17 μm). These microbands may be individually polarized at different potentials in order to generate a species at one of them and detect it at the other one. Cyclic voltammetry has been used to test and characterize the two working surfaces. The capacity of these dual-electrodes for working as generator/collector sensors is demonstrated by recording the generated and collected currents by chronoamperometry with a bipotentiostat. The collected current is about 30% of the generated current. These sensors have been adapted to a flow cell, allowing detection of sub-nanomoles of solute.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-00877381
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Submitted on : Monday, October 28, 2013 - 1:39:48 PM
Last modification on : Thursday, March 5, 2020 - 7:14:22 PM

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Alice René, Cyril Cugnet, Didier Hauchard, Laurent Authier. Elaboration of screen-printed microelectrodes working as generator/collector and their use in a flow cell system. Sensors and Actuators B: Chemical, Elsevier, 2012, 174, pp.225-230. ⟨10.1016/j.snb.2012.07.109⟩. ⟨hal-00877381⟩

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