Hybridized Graphene Field-Effect Transistors for Gas Sensing Applications

Abstract

The extraordinary properties of graphene and its derivatives from chemical, physical, electronic, and mechanical perspectives have sparked great interest in a variety of applications. The two-dimensional (2D) nature, high surface-to-volume ratio, low electronic noise, and high surface sensitivity make it a desirable channel material in the gas sensing domain. The field effect and ambipolar nature of graphene enable it for field-assisted gas sensing that provides greatly higher sensitivity and stronger selectivity toward a particular gas/volatile organic compound (VOC). This book chapter is highlighting the selective importance of graphene and its derivative-based field-effect transistors (FETs) and their application in gas/VOC sensing. This chapter begins with a brief description of the origin of graphene and its properties for a variety of applications. Then a detailed discussion involves the type, properties, and synthesis methodology of graphene FET. Finally, we introduced graphene, its derivatives, and its composites with other nanomaterials-based gas/VOC sensors in three-terminal FET configurations.