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Additional info for Electrochemical Strategies in Detection Science
8 shows how these generator–collector systems works in general on a reversible redox couple. Generator–collector systems are defined by several parameters, the most common of which is their collection eﬃciency. 134 Collection eﬃciency, ieﬀ, is the ratio between the current registered at the collector and that registered at the generator (ieﬀ ¼ Àicol/igen). The number of redox cycles, Rc, on the other hand, gives an idea of the number of times that species shuttle to and fro between adjacent microbands.
Miniaturization and integration requires small connection tracks, which may introduce considerable electrical resistance. 146,147 This aspect should be specially borne in mind when high currents and low impedances are expected. In addition, the use of nonmetallic materials such as polymers might require connection tracks with larger section due to the low conductivity values of those materials. The contact resistance can be indirectly assessed through an accurate EIS characterization using solutions of diﬀerent conductivity.
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