Investigation of PANI/Graphene for Gas Sensor Applications

PANI/graphene has been extensively studied as a sensing material for various gasses like H2, CH4, NH3, many toxic gasses, etc. PANI and graphene show change in resistance during interaction with the gas molecules adsorbed by the surfaces. But when PANI/graphene makes composite, the surface area is increased which in turn increases the active sites for the adsorption of gasses due to which the sensitivity of the sensor enhances significantly than that of the individual materials. In this chapter, the sensing property of PANI/graphene in exposure to a few gasses such as H2, NH3, CH4, and toluene has been discussed along with the simple method for synthesis of the material and some characterization studies.