Gas Sensor with Different Morphology of PANI Layer

This work presents the design of a polymer-film-based sensor for gas detection. Different types of polyaniline are used as active layers. The advantages of resistive sensors with PANI layers are easy preparation and low production cost. At room temperature, polymer films have a high sensitivity to gas concentrations. The developed sensor works on the idea of electrical resistance shifting with gas concentration. Three different polymerization solutions are employed to synthesize the polyaniline (PANI) active layers (aqueous solution, sulfuric acid solution, and acetic acid solution). Active layers are evaluated in a controlled environment for their ability to detect ammonia, carbon monoxide, nitrogen monoxide, acetone, toluene, and relative humidity in synthetic air. PANI layers polymerized in acetic acid solutions exhibit good sensitivity toward ammonia.

Automated summary

This study presents the design of a polymer-film-based gas detection sensor using different types of polyaniline as active layers. The resistive sensors with PANI layers have the advantages of easy preparation and low production cost. The polymer films exhibit high sensitivity to gas concentrations at room temperature. The developed sensor works based on the principle of electrical resistance shifting with gas concentration. Three different polymerization solutions are used to synthesize the PANI active layers, and the PANI layers polymerized in acetic acid solutions show good sensitivity towards ammonia.