Table 3 Summary and comparison of flexible humidity sensing performance using various sensor materials
Material | Working range (%) | Working resistance (Ω) | Response time (s) | Recovery time (s) | Sensitivity (%) | Reference |
|---|---|---|---|---|---|---|
CuO nano wire | 20–80 | 0.5 ~ 3*106 | 120 | 120 | - | [40] |
SnO2 nanowire | 30–85 | 8*105 ~ 2*107 | 120–170 | 30–60 | 35 | [41] |
GO/PDDA film | 11–97 | 0.5 ~ 2.7*106 | 108–147 | 94–133 | 37.43 | [42] |
Black phosphorous | 11.3–97.3 | 0.6 ~ 2*104 | 255–360 | 10–480 | 42.85–99.17 | [43] |
VS2 | 0–50 | 5*103 ~ 3*105 | 30–40 | 12–50 | 300 | [44] |
Epoxy/CNT | 10–90 | 0.8 ~ 1.3*103 | 38 | 60 | 1,990 | [45] |
CNT/PVA fiber | 46–98 |  > 0.8*104 | – | – | 140,000 | [46] |
GO/PANI | 11–97 | – | 8 | 5 | 20 | [47] |
Pt/GO fiber | 6.1–99 |  > 500 | 2 | 4 | 4.51 | [48] |
GO/PEI | 11–97 | – | 34 | 10 | 27.3 | [49] |
CNT/GO | 10–80 | 13 ~ 96 | 4 | 3 | 9.8 | [50] |
CNT@CPM | 30–100 | 12 ~ 370 | 10–40 | 10–40 | 56.7–111.1 | This work |