Table 2.
Comparison of the performances of different NiO based ethanol sensors. UT=Ultrathin.
| Sample | Ethanol (ppm) | Operating Temperature | Rg/Ra | Response/Recovery Time (s) | Ref. |
|---|---|---|---|---|---|
| Grained-flower | 150 | 200 | 35 | 3/6 | This work |
| Nanoparticles | 200 | 250 | 32 | 4/8 | This work |
| UT-Nanosheet | 200 | 200 | 3.1 | N/A | [24] |
| Flake-flower | 400 | 300 | 32 | 4/8 | [23] |
| Nanoblocks | 500 | 300 | 1.1 | 5/5 | [20] |
| Nanorods | 500 | 300 | 1.4 | 4/5 | [20] |
| Nanowires | 500 | 300 | 3.4 | 5/6 | [20] |
| Nanosheet | 50 | 350 | 1.8 | 6/9 | [21] |
| Nanobulks | 50 | 350 | 1.5 | 5/7 | [21] |
| Nanospheres | 50 | 350 | 2.5 | 8/5 | [21] |