Table 1.
Electrochemical characterization of the modified electrodes. Data from EIS experiments. Charge-transfer resistance (Rct), electrolytic solution resistance (Rs), constant phase element (CPE) with pre-exponential factor (P) and exponent (n) and Chi-squared function (χ2).
| Electrode | Rct (kΩ) | Rs (Ω) | CPE |
Χ2 x 10−3 | |
|---|---|---|---|---|---|
| P x 10−5 | n | ||||
| SPAuE | 1.3 ± 0.2 | 35.1 ± 1.6 | 3.4 | 0.867 | 1.6 |
| Peptide | 25.0 ± 0.8 | 28.0 ± 2.8 | 2.0 | 0.845 | 0.3 |
| Peptide/MCH | 21.9 ± 0.1 | 35.7 ± 0.9 | 1.0 | 0.925 | 1.0 |
| Peptide/MCH/Spike protein 0.1 μg/mL | 10.9 ± 0.6 | 34.2 ± 1.5 | 1.1 | 0.866 | 0.7 |