Study of the Mechanism of Response of ThinLayerPolyaniline to the Aroma of Ginger andCloveEssential Oils

Polyaniline (PANI) is widely used as a gas-sensing Material because it has anactivegroup that can interact with various chemical compounds. This study examined the responses of PANI thin layers to the aromas of ginger oil and clove oil to understand howthe chemical properties of the target molecules Influence sensor performance. The test results showedthat thesensor had high stability and repeatability in both samples. In ginger oil, the interaction betweengingerol–zingiberene with the amine and amine groups of PANI resulted in an average responsetime of 34.33 ± 0.47 s and a recovery time of 35.33 ± 0.47 s (at a volume of 1 ml). Meanwhile, clove oil showed a faster response time (30.67 ± 0.47 s) but stronger interactions duringtherecovery phase. A Relative Standard Deviation (RSD) below 2% throughout the test cycle indicatesthat the adsorption-desorption mechanism is reversible and consistent. These results confirmthat the chemical properties of the target molecule determine the response’s kinetic profile, while thePANI microstructure provides crucial stability in the design of reliable scent sensors.