Table 2.
Comparison among impedimetric label-free Escherichia coli O157:H7 immunosensors.
| Schematic Immunosensor Assembly | Working Principle | Linear Range (log cfu/mL) |
LOD (cfu/mL) |
References |
|---|---|---|---|---|
| Au + PANI + Glu + anti-E. coli | Resistive | 2–7 | 100 | [25] |
| Au + MHDA | Resistive | 1.47–8.48 | 2 | [26] |
| GOPE + AuNPs + Streptavidn + Biotin + anti-E. coli | Resistive | 2.17–8.17 | 150 | [27] |
| Epoxysilane-mod. ITO + PDMS + anti-E. coli | Resistive | 1–6 | 10 | [28] |
| Pt + SrTiO3 + APTES-Glu + anti-E. coli | Capacitive | 1–7 | 10 | This work |
| Au + Cys + Glu + anti-E. coli | Resistive | 1.47–1 | 30 | This work |
PANI: polyaniline; Glu: glutaraldheyde; MHDA: 16-mercaptohexadecanoic acid; GOPE: graphene oxide paper electrode; PDMS: poly(dimethylsiloxane).