Table 4. Test Results of PAAm/MWCNTs-QCM at Different Proportions to 4 ppm Formaldehyde.
| PAAm/MWCNTs proportion | response time (s) | recovery time (s) | frequency response value (Hz) |
|---|---|---|---|
| 0.5:1 | 95 | 100 | 1.4 |
| 1:1 | 100 | 93 | 2.5 |
| 1:2 | 175 | 163 | 2.5 |
| 2:1 | 345 | 483 | 6.1 |
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