Table 1.
Comparing study between the present work with some recent impedimetric label—free immonosensors for E. coli O157:H7 detection.
| Schematic Immunosensor Assembly | Sensitivity [Ω mL/cfu*cm2] | Linear Range [cfu/mL] | LOD [cfu/mL] | RSD [%] | References |
|---|---|---|---|---|---|
| Au + PANI + Glu + anti-E.coli | 1 × 102–1 × 107 | 100 | [14] | ||
| Au + MHDA + anti-E.coli | 772,050.00 | 3 × 101–3 × 104 | 20 | 2.0 | [15] |
| Au-MBA-Ab | 784,615.38 | 3 × 101–3 × 105 | 30 | 4.3 | This work |
| Au-MBA-ProteinA/G-Ab | 2,228,076.92 | 3 × 102–3 × 107 | 300 | 5.1 | This work |
| Au-Cys-Ab | 283,589.74 | 3 × 101–3 × 107 | 30 | 2.9 | This work |
| Au-Cys-Ferrocene-Ab | 141,923.07 | 3 × 100–3 × 105 | 3 | 3.8 | This work |
| Au-Cys-PAMAM-Ferrocene-Ab | 1,166,666.67 | 3 × 103–3 × 106 | 3000 | 4.7 | This work |
PANI: Polyaniline; Glu: Glutaraldheyde]; MHDA: 16-mercaptohexadecanoic acid; Cys: Cysteamine; PAMAM: Polyamidoamine dendrimer; Ab: antibody.