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. 2020 Sep 17;10:15281. doi: 10.1038/s41598-020-71962-3

Figure 3.

Figure 3

PSA sensitivity dependence on chemristors’ operating regime. (a) Six identical devices (D1–6) are electroformed for bringing them in to two baseline operating regimes D1–3 (I) and D4–6 (II) in dry-condition. All sensors are then exposed to a PSA solution in PBS with a mild PSA concentration of 0.6 ng/mL, resulting into a further shift in the baseline operating regimes, shown in (b). The PSA concentration is progressively increased (tenfold) in four stages and following incubation the RS of all sensors are recorded for all four antigen concentrations. (c, d) Depict the corresponding PSA state-dependent responses for the six transducers under consideration (D1–3 and D4–6).