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Graphene (GN) and related nanomaterials have unique optical,electrical,magnetic,thermal and other properties,and they bring new vitality to the development of Analytical Chemistry.We proposed the fabrication of graphene (GN) films by electrochemical reduction method,and by coupling with the spray-coating technique,this route may realize the controllable synthesis of large-area GN films with different thicknesses and/or patterns on various conductive and insulating substrates.