Table 1 Comparison of humidity sensing characteristics of similar previous investigations with our fabricated CNT-PDMS sensors.
Type | Sensing material | Flexible/Rigid | Response time (s) | Recovery time (s) | Ref |
|---|---|---|---|---|---|
Capacitive | nanofibrillated cellulose/graphene oxide/PDMS | Flexible | 57 | 2 | |
Impedance | Armalcolite/PDMS | Flexible | 10 | 15 | |
Resistive | CNT | Rigid | 40 | 60 | |
Self-powered | PFSA* | Flexible | 30 | – | |
Passive TENG | PTFE | Rigid | – | – | |
Passive TENG | rGO/PVP | Rigid | 2.8 | 3.5 | |
Active TENG | CNT-PDMS | Flexible | 1.8 | 2.5 | This work |
