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. 2019 Sep 25;7:237. doi: 10.3389/fbioe.2019.00237

Figure 1.

Figure 1

(A) The two modes of detection mechanism in organic electrochemical biosensors. Mode-1 detection involves direct interaction between polymer functionalities and the analyte, while mode-2 detection requires additional, biosensing moieties such as enzymes, antibodies, or bacteria to be chemically attached to the polymer. (B) Chemical structures of organic semiconductors used in electrochemical biosensors in recent literature.