| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1440492 | Synthetic Metals | 2015 | 8 Pages |
•PEDOT:PSS/Fe(III)(salen) composite thin film coated by spin-coating was used as sensitive material.•PEDOT:PSS/Fe(III)(salen) composite thin film presented CO gas detection with good reproducibility and fast response–recovery time.•Gas response increases with increasing the flow rate of the CO gas.•Reversible PEDOT:PSS/Fe(III)(salen) sensor exhibits high response and best selectivity to CO gas at room temperature.•Addition of Fe(III)(salen) increased the effective surface area for the absorption of CO compared to the polymer layer.
PEDOT:PSS/Fe(salen) composite thin films were coated on glass pieces with interdigitated Au electrodes by spin coating method for CO gas sensing application. The metal complex doped PEDOT:PSS film was experienced by some common atmospheric gases to examine its identification ability for CO gas detection. The highest response factor (ΔR/R0 × 100) and lowest response time were gained −31.32 ± 0.88% and 38 s, respectively. An optimum level of doping (0.1 wt.% of Fe(salen)) was established for the highest sensitivity. The results showed that the sensor response was reproducible (RD < 2%) and fast recovery (5 s) in dry atmosphere and room temperature. The Fe(salen)-doped PEDOT:PSS was well characterized by different techniques such as UV–vis and FTIR spectroscopy. In addition, the surface topography of Fe(salen) doped PEDOT:PSS film was investigated using AFM. The results of this study can be helpful in selecting appropriate procedure for utilizing PEDOT:PSS/Fe(salen) composite for effective gas sensing applications.
