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. 2023 Jan 11;13(1):125. doi: 10.3390/bios13010125

Figure 4.

Figure 4

(a) The DC equilibrium potential superimposed with a frequency-varied AC voltage for EIS measurement. (b) Typical Nyquist plots measured by EIS with and without analyte immunoreaction. (c) The Randels equivalent circuit. (d) 1R//C equivalent circuit.