Theory and Experiments of Transport at Channel Microband Electrodes Under Laminar Flow. 3. Electrochemical Detection at Electrode Arrays under Steady State

摘要

Microband arrays improve the analytical performance andninformation content of electrochemical detection in flownchannel relative to single-electrode configurations. However,nexploiting their full advantages requires a detailednunderstanding of the properties of arrays, which dependnon their geometry and on the hydrodynamic regimesnestablished inside the microfluidic channel. This paperninvestigates the influence of two main operating situationsn(sequential and coupling regimes) on steady-state amperometricnresponses of microband arrays performingnunder laminar flow conditions. Simulations and experimentalnmeasurements showed that the resulting propertiesnof the arrays are a function of the number of electrodesnand average ratio between gaps and electrodenwidths, whether the layout of the arrays is regular or not.nSince the contribution of each electrode can be finelyntailored, this allows the arrays to be designed and adaptednto a wide variety of experimental demands.