Microelectrode arrays for electroactive species detection in high resistive media

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Actual electrochemical sensors should be reliable and as versatile as possible. They should be able to make measurements in various media and in drastic conditions. From this point of view, microelectrode based sensors already developed since many years at CSEM provide unique solutions to many applications in electrochemical analysis that cannot be achieved with conventional electrodes (macroelectrodes). A well-known problem encountered with conventional electrodes is their lack of sensitivity toward electroactive species present in high resistive aqueous media. This problem is the consequence of the high ohmic drop near electrode interface. However, this problem can be overcome in using microelectrodebased sensors because, due to their geometrical characteristics and low ohmic drop, their response is almost independent of the media conductivity.

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