The nonuniform diffusion
profile to the edge of many multifunctional
microelectrodes has the potential to give rise to distortions in its
imaging capability, reducing the spatial accuracy of the techniques
they are used in. In this work, numerical simulations are used to
predict these distortions for dual-barrel electrodes used in the combined
feedback/generation–collection mode of scanning electrochemical
microscopy imaging a model substrate. The sensitivity of this distortion
to tip–substrate distance, electrolyte composition, and size
and shape of a reactive substrate feature are discussed
