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. 2020 Jul 16;20(14):3956. doi: 10.3390/s20143956

Figure 1.

Figure 1

Basic principles of this research strategy: (A) assembly process of the composite material obtained by modifying reduced graphene oxide (rGO) with polyethyleneimine (PEI) and gold nanoclusters (AuNCs) (PEI-rGO-AuNCs); (B) assembly steps of electrochemical sensors. CE = counter electrode, RE = counter electrode, and WE = working electrode.