TABLE II.
Comparison of the rectification ratios of ionic current diodes reported in the literature.
| Rectification principles | Underlying mechanisms from Table TABLE I. | Authors and publication year | Rectification ratios (sweep bias) |
|---|---|---|---|
| Acid-base electrolyte junctions | 1, 4 | Hegedüs et al. 199923 | ∼40 (±5 V) |
| Conical nanochannels with asymmetrically charged inner walls | 1, 2 | Vlassiouk et al. 200710 | 217 (±5 V) |
| Polyelectrolyte junction with oppositely charged backbones | 1, 3, 4 | Cayre et al. 200718 | ∼40 (±5 V) |
| Conical nanochannels with charged polymer brushes | 1, 2 | Yameen et al. 200929 | 22 (±2 V) |
| Nanochannels with asymmetrically charged inner walls | 1, 2 | Cheng et al. 200930 | 321 (±1 V) |
| Nanochannels with asymmetric geometries and concentration polarization | 1, 2 | Jung et al. 200931 | ∼2 (±3 V) |
| Polyelectrolyte junctions with oppositely charged backbones | 1, 3, 4 | Han et al. 200919 | ∼ 100 (±1 V) |
| Nanochannels with asymmetrically charged inner walls | 1, 2 | Yan et al. 200932 | ∼5 (±5 V) |
| Nonlinear conductivity of a SiO2 nanofilm/agarose gel interface | 1, 2, 3 | Koo et al. 201020 | 38 000 (±5 V) |
| Electric bias- and pH-dependent formation of insulating oxide layer | 1, 4 | So et al. 201221 | ∼14 (±5 V) |