Table 1.
Comparison of SrTi0.8Fe0.2O3-δ samples prepared by conventional means and by nanotechnology. R/R0 values towards different analyte gases (concentration as indicated) obtained at 400 °C in dry air.
| microscaled thick film | electrosprayed film | electrospun film | nanoscaled thick film | |
|---|---|---|---|---|
| R0 / kΩ2 | 1.7 | 16 | 1690 | 620 |
| R/R0 | ||||
| Propane (500 ppm) | 1.4 | 1.6 | 1.9 | 4.5 |
| Propene (500 ppm) | 1.7 | 2.2 | 5.1 | 12.0 |
| Ammonia (500 ppm) | 1.8 | 3.7 | 4.0 | 4.2 |
| NO (500 ppm) | 1.5 | 2.4 | 1.9 | 2.4 |
| CO (500 ppm) | ≈ 1 | 1.2 | 1.4 | 2.4 |
| H2 (1000 ppm) | ≈ 1 | 1.05 | 1.05 | 1.6 |