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. 2020 Feb 4;20(3):836. doi: 10.3390/s20030836

Figure 1.

Figure 1

(a) SEM image of one block of the microelectrode array chip, which contained 15 pieces (pcs) of working electrodes (WEs) (top view, ∅67 μm). (b) SEM image of a single WE (45° tilted view, ∅67 μm).