SYNTHESİS AND CHARACTERİSTİCS OF A POLYANİLİNE-SİNGLE WALLED CARBON NANOTUBES BASED HYBRİD GAS SENSOR

Abstract

It is known that gas sensors are important devices used to detect chemical vapors and various gases in the atmosphere with high sensitivity, selectively and effectively. The miniaturization and reliability of these sensors has been one of the main research topics. The reason for this is the limited technical performance of traditional gas sensors such as metal-oxide semiconductor (MOS) and electrochemical, which makes the mentioned sensors irrelevant for practical applications. New types of sensors, based on modern technologies and using innovative methods for meeting and solving the needs arising from these reasons, are an effective solution. From this position, hybrid gas sensors created on the basis of conductive type polymers, in particular polyaniline (PANİ), attracted special attention. Π communication and conjugated structure present in conductive type polymer material facilitate charge transfer, while SWCNT gives hybrid sensor the peculiarity of detecting UVBs in terms of high sensitivity, selectivity and reaction time by increasing electron walkability and high surface area. At the same time, the selected comb-shaped configuration covers most of the sensor in terms of surface-volume and significantly increases the response time of the sensor. The PANİ-SWCNT based hybrid gas sensor was synthesized in the paper and it was shown that it has high practical application potential in the field of environmental monitoring. Using the unique properties of conductive type polymers and nanomaterials, the article proposes hybrid gas sensors as an alternative to traditional gas sensors, as more reliable, energy-efficient next-generation sensors. This, in turn, will be of great importance for future research.