Summary of recently reported piezoresistive pressure sensors.
| Material | Pressure sensitivity | Sensing range | Detection limit | Response time | Ref. |
|---|---|---|---|---|---|
| CB@PU sponge | 0.068 kPa−1 | 60% strain (16 kPa) | 17 Pa | 20 ms | 24 |
| Graphene/polyurethane sponge | 0.26 kPa−1 | 10 kPa | 9 Pa | — | 25 |
| rGO/PI nanocomposite foam | 0.18 kPa−1 | 50% strain (6.5 kPa) | — | — | 17 |
| Au/PU sponge | 0.122 kPa−1 | 60% strain (14 kPa) | 0.568 Pa | 9 ms; 500 mm s−1 | 28 |
| MWNT–rGO@PU foam | 0.088 kPa−1 | 99% strain (50 kPa) | 3.7 pa | 30 ms | 26 |
| GO/PPy@PU sponge | 0.79 kPa−1 | 80% strain (15 kPa) | 75 Pa | 70 ms | 29 |
| PEDOT:PSS/PI aerogel | 0.054 kPa−1 | 70% strain (17 kPa) | — | — | 45 |
| PI/CNT aerogel | 0.11 kPa−1 | 0–80% strain (0–61 kPa) | <10 Pa | 50 ms; 1000 mm min−1 | 44 |
| Polyimide-based graphene foam | 0.36 kPa−1 | 50% strain (15 kPa) | — | 80 ms | 23 |
| rGO/PANi@melamine sponge | 0.152 kPa−1 | 27 kPa | — | 96 ms | 46 |
| This work | 1.33 kPa−1 | 80% strain (59 kPa) | 3 Pa | 60 ms; 250 mm min−1 |