ABSTRACT
Although discovered only recently in 2004, graphene has already established itself as an outstanding material for sensing applications due to its excellent properties that include a two-dimensional structure with unsaturated bonds, high carrier mobility, extraordinary mechanical strength, chemical inertness, and low thermal and 1/f noise. In this chapter, we will perform a review of graphene as a material for developing physical, chemical, and biological sensors, and discuss the correlation between its various sensing applications and fascinating material properties. The dependence of sensing properties of graphene on the substrate on which it is grown or transferred will be discussed in addition to other possible means of modulating its sensitivity to various analytes. The importance of surface work function measurements on graphene to reveal its material properties will be highlighted, and correlation between conductance and surface work function changes caused by molecular adsorption on graphene lms, and their quantitative modeling within the framework
of carrier transport theories will be discussed. The formation of technologically signicant heterostructures between graphene, various semiconducting thin lms, and other emerging two-dimensional materials, and their applications in realizing physical or chemical sensors, will be included as a part of future trends.
