Table 3.
Detect limits of sensors based on conducting polymers and their composites to several gas analytes
| Analyte | Sensing material | Detect limit | Sensor type | Reference |
|---|---|---|---|---|
| NH3 | PAni/SWNT | 50 ppb | Chemresistor | [210] |
| NO2 | PPy/PET | <20 ppm | Chemresistor | [36] |
| PTh/CuPc | 4.3 ppm | Chemresistor | [53] | |
| PAni/In2O3 | <0.5 ppm | SAW | [216] | |
| HCl | PAni/FeAl | 0.2 ppm | Chemresistor | [235] |
| H2S | PAni/heavy metal salts | <10 ppm | Chemresistor | [66] |
| CO | PAni/FeAl | 10 ppm | Chemresistor | [47] |
| PAni/In2O3 | <60 ppm | SAW | [216] | |
| Water | PAni | < 25 ppm | Chemresistor | [30] |
| Methanol | PAni/Pd | <1 ppm | Chemresistor | [33] |
| Methane halide | Poly(3-methylthiophene)/MWNT | Several ppm | Chemresistor | [127] |
| PAni/Cu | <10 ppm | Chemresistor | [101] | |
| Acetone | PTh copolymer | 200∼ 300 ppm | Chemresistor | [182] |
| Toluene | PTh copolymer | 20 ppm | Chemresistor | [182] |
| Butylamine | Poly(anilineboronic acid) | 10 ppb | Chemresistor | [80] |