Figure 7.
SEM micrographs of neat GCE (a), rGO/GCE (b), and rGO/GCE/Fe3O4-PPy (c). Nyquist plots (d) and CV (e) of neat GC (a), rGO/GC (b) and rGO/GCE/Fe3O4-PPy (c). Taken from [70], copyright 2021, Elsevier.
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