Molecular Sensing by the Means of Graphene Based Field Effect Transistor

In this article we will show how different molecules can be identified by the use of graphene nanoribbon. Conductance depend on frontier energy level and spatial orientation of molecules. With this feature, electron transport through molecules that are physically attracted to nanoribbon can be described and calculated. We show that electron transport is unique to each molecule. Because when a molecule attach on graphene nanoribbon sharp dips in T-E graph appears that these dips are different for each molecule. In this paper, physical adsorption of three molecules like ethanol (C2H6O), sulfur dioxide (SO2) and benzene (C6H6) has been studied on graphene nanoribbon.