Table A2.
Comparison of performance of the selected semi-dry EEG electrode.
| Electrode | Contact Impedance | Signal Quality | Biocompatibility (Cell Viability) | Ref. | |
|---|---|---|---|---|---|
| Stationary | Motion | ||||
| Bristle-shaped semi-dry electrode | 15 kΩ | Correlation: >90% | - | - | [59] |
| AgNWs/PVB/melamine sponge (AgPMS) | <10 kΩ | - | - | - | [61] |
| Flexible multi-layer semi-dry electrode | 23.89 ± 7.44 kΩ (Oz) 18.18 ± 7.51 kΩ (Fpz) |
Correlation: 95.84% | Correlation: 90.65% | - | [23] |
| CF-based conductive silicone sponge EEG electrodes | 2.5 kΩ | - | - | - | [62] |
| Micro-seepage electrode | 9.3 kΩ (NaCl); 13.5 kΩ (PBS); |
- | - | - | [37] |
| Polymer wick-based quasi-dry electrode | 3–5 kΩ | Correlation: 98.2 ± 2.1% Coherence: 97.3 ± 3.0% | - | - | [66] |
| Passive electrode based on porous Ti | <10 kΩ (NaCl) | Correlation: 95.55% Coherence: 95.2% SNR: 24.4 dB |
- | - | [63] |
| Polycarbonate polymer wick column shape | <30 kΩ | - | - | [67] | |
| Porous ceramics column shape | 44.4 ± 16.9 kΩ | Correlation: 88.3−99.7% | - | - | [45,64] |
| L2-ePt electrode | 10.0 ± 6.03 kΩ | Correlation: 94 ± 5.3% | - | - | [65] |
| Quasi-dry electrode | - | Correlation: 65−97% | - | - | [27] |