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(A) SEM image of a conical microelectrode fabricated by consecutive electrodepositions of platinum and platinum black on a tungsten substrate (Pt-B/Pt/W); (B) Magnified view of the conical tip of the Pt-B/Pt/W microelectrode shown in (A); and, (C) Schematic illustrating the multilayered structure of platinum and platinum black deposited on the tapered tungsten wire.
