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. 2021 May 20;9:671173. doi: 10.3389/fchem.2021.671173

Figure 8.

Figure 8

CVs of different modified electrodes; bare SPCE, and GO- and GO/Cu(II)-modified SPCEs in 0.10 M NaOH solution with the absence and presence of 5.0 mM glucose at a scan rate of 50 mV s−1.