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A Novel Trace-Level Ammonia Gas Sensing Based on Flexible $PAni-CoFe_{2}O_{4}$ Nanocomposite Film at Room Temperature
| Content Provider | MDPI |
|---|---|
| Author | Alharthy, Rima D. Saleh, Ahmed |
| Copyright Year | 2021 |
| Description | In this study, we developed a new chemi-resistive, flexible and selective ammonia $(NH_{3}$) gas sensor. The sensor was prepared by depositing thin film of polyaniline-cobalt ferrite $(PAni-CoFe_{2}O_{4}$) nanocomposite on flexible polyethylene terephthalate (PET) through an in situ chemical oxidative polymerization method. The prepared $PAni-CoFe_{2}O_{4}$ nanocomposite and flexible $PET-PAni-CoFe_{2}O_{4}$ sensor were evaluated for their thermal stability, surface morphology and materials composition. The response to $NH_{3}$ gas of the developed sensor was examined thoroughly in the range of 1–50 ppm at room temperature. The sensor with 50 wt% $CoFe_{2}O_{4}$ NPs content showed an optimum selectivity to $NH_{3}$ molecules, with a 118.3% response towards 50 ppm in 24.3 s response time. Furthermore, the sensor showed good reproducibility, ultra-low detection limit (25 ppb) and excellent flexibility. In addition, the relative humidity effect on the sensor performance was investigated. Consequently, the flexible $PET-PAni-CoFe_{2}O_{4}$ sensor is a promising candidate for trace-level on-site sensing of $NH_{3}$ in wearable electronic or portable devices. |
| Starting Page | 3077 |
| e-ISSN | 20734360 |
| DOI | 10.3390/polym13183077 |
| Journal | Polymers |
| Issue Number | 18 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-09-12 |
| Access Restriction | Open |
| Subject Keyword | Polymers Industrial Engineering Polyaniline Cobalt Ferrite Ammonia Gas Sensor Flexible Nanocomposite |
| Content Type | Text |
| Resource Type | Article |
