Functionalized Graphene Nanocomposites for Electrochemical Sensors

Abstract Graphene, an intriguing two-dimensional carbon material, has attracted much research attentions from scientists due to several breakthroughs in fundamental research and promising practical applications. Graphene is known for its excellent electrical conductivity and mechanical stability; as a result, it has been serving as the ultimate electrode material for various electrocatalytic applications. Further, the contribution of graphene in electrochemical sensing is notable. In that sense, modifying/functionalizing graphene surfaces with desirable functional groups and nanomaterials makes the resulting composite more efficient than the individual components. Hence, much research has been undertaken to attain a better material using graphene. Graphene has been successfully utilized as electrode modifier to sense a wide variety of analytes. In this chapter, recent articles related to functionalized graphene nanocomposites based electrochemical sensors for bioanalytes are reviewed and we present the detailed results of functionalized graphene nanocomposites-based electrochemical sensors for nitric oxide, glucose, cholesterol, and neurotransmitters.