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. 2019 Sep 16;19(18):3990. doi: 10.3390/s19183990

Figure 4.

Figure 4

EIS characterization for each surface modification step of the SPCE and after immunosensing as represented by (a) Nyquist and (b) Bode plots. (c) The normalized impedance variation observed at different frequencies for immunosensing with a 300 µg/mL has-spiked sample solution.