▎ 摘　　要

Graphene (G) has been reported as one of the most interesting material because of its outstanding properties including flexibility, high mobility, transparency, heat dissipation ability, and so further. Graphene due to its unusual band structure, two-dimensional (2D) nature and electrical tenability has shown potential to be adopted in solid state gas sensors. Generally, the gas sensing mechanism of graphene is based on the resistance change due to the charge transfer between the adsorbed gas molecules and graphene surface. Many reports results have shown that the gas molecules including NH3 and NO2 are weakly adsorbed on the surface of pristine graphene. In this report we have enhanced the gas sensing property of graphene by decorating the graphene surface with typical organic semiconductor material i.e., iron Phthalocynine (FePC). The basic purpose was to functionalizing the graphene channel, to adsorb the more target gas molecules. The prepared FePC/G hybrid system shows the sensitivity response/recovery and excellent selectivity for NH3 gas at room temperature.