Table 1.
ZnO-based electrochemical biosensors for glucose detection (GOD as enzyme) (GCE: glass carbon electrode; Gold/Ti/PET: Gold/Ti/poly (ethyleneterephthalate); “/” in the table means the corresponding content is not provided.)
| Ref. | [13] | [14] | [15] | [16] | [17] | [18] | [19] | [20] |
|---|---|---|---|---|---|---|---|---|
| Electrode | Gold | / | gold | gold | gold | GCE | Gold/Ti/PET | Ti |
| Fabrication of ZnO | Vapor-phase transport | Vapor-liquid-solid | Thermal evaporation | Thermal evaporation | hydrothermal | Wet chemical route | Nanocluster-beam | Wet chemical route |
| ZnO structure | nanocombs | nanowires | nanowires | nanonails | nanorods | nanoparticles | nanoparticles | carbon-decorated nanowires |
| Immobilization mode | Physical adsorption | Physical adsorption | Physical adsorption | Physical adsorption | Physical adsorption | Physical adsorption | Cross-linking | Physical adsorption |
| Working potential (V) | +0.8 | +0.8 | +0.8 | +0.8 | +0.8 | −0.5 | +0.8 | −0.45 |
| Response time (s) | <10 | / | <10 | <10 | <5 | / | <8 | <5 |
| KM (mM) | 2.19 | / | 2.1–11.8 | 15 | 2.9 | / | 21 | 1.54 |
| Sensitivity (μA/ cm2·mM) | 15.33 | / | 26–0.8 | 24.6 | 23.1 | / | 13.3 | 35.3 |
| Linear response range (mM) | 0.02–4.5 | 0.1–10 | / | 0.1–7.1 | 0.01–3.45 | 0.05–8.2 | 0–4 | 0.01–1.6 |
| detection Limit (μM) | 20 | / | 0.7 | 5 | 10 | 10 | 20 | 1 |