Table 1.
Summary of the gas sensing properties of ZnO, shown in Figure 6. The equation column shows the best-fit lines for the sensitivity of the thin film (solid lines in Figure 6).
| Reacting gas | Temperature | Equation | Concentration |
|---|---|---|---|
| Hydrogen (H2) [28] | 350 °C | 4.43 · e0.0088·Cppm | 50 ppm–400 ppm |
|
| |||
| Liquid petroleum gas (LPG) [29] | 300 °C | 43.1 · e0.0063·Cppm | 20 ppm–100 ppm |
|
| |||
| Acetone ((CH3)2CO) [30] | 275 °C | 382 · ln(Cppm + 1686) – 2737 | 400 ppm–4000 ppm |
| 300 °C | 710 · ln(Cppm + 2705) – 5561 | ||
|
| |||
| Ethanol (C2H5OH) [30] | 275 °C | 157 · ln(Cppm + 385) – 850 | |
| 300 °C | 290 · ln(Cppm + 2330) – 2100 | ||