Table 3. Sensitivity (×10−2 % · ppm−1) of differently functionalized MWCNT sensors to VOCs and nitrogen dioxide.
| Benzene | Toluene | Methanol | Ethanol | Acetone | Nitrogen dioxide | Ref. | |
|---|---|---|---|---|---|---|---|
| MWCNT/Au | 27.8 | 11.7 | 37.3 | 45.6 | 2.8 | 3750 | TW |
| MWCNT/Au/MHDA | N/D | N/D | 108.9 | 523.3 (488.5 @ 50% R.H.) | 32.4 | 45 | TW |
| MWCNT/Au/Cav | 420 (48 @ 60% R.H.) | 11 | N/A | 17 | N/A | 430 | 45 |
| MWCNT/Pt | N/A | N/A | 6.7 | 9.9 | 2.1 | 9.4 | 16, 42 |
| MWCNT/Pd | 3.5 | N/A | 6.7 | 9.9 | 1.9 | 6.9 | 16, 42 |
| MWCNT/Rh | 3.3 | 28 | 12.5 | 7.7 | 2.5 | 5.5 | 41, 63 |
| MWCNT/FeO | 25 | 58 | 5 | 26 | 0.8 | N/A | 26 |
Measurements were performed under dry conditions unless otherwise specified.
TW: This Work; N/D: Not Detected; N/A: Not available.