Abstract
AbstractHighly ordered ultra‐micro‐electrode arrays are obtained using nanosphere lithography combined with electrochemical reduction of an aryl diazonium salt. A template made up of 2D hexagonally close‐packed polystyrene (PS) spheres was first deposited on indium tin oxide or glassy carbon substrates. Then, a thin layer of bisthienylbenzene (BTB) was grafted onto the interstices between the spheres. After dissolution of the PS spheres, the presence of micro‐hole arrays on the substrates was evidenced by atomic force microscopy. The electrochemical response of these micro‐hole arrays was investigated as a function of the size of the spheres used. Depending on their radius and the distance between adjacent holes, they behave as a partially blocked surface or as ultra‐microelectrode arrays (UMEAs).
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