Graphene/poly(methyl methacrylate) chemiresistor sensor for formaldehyde odor sensing

► Application of graphene/PMAA composite as CH2O sensing device. ► Interaction of graphene with CH2O was found to be the reason for response creation. ► The dominant mechanism was found to be defined by graphene/polymer ratio. ► Response surface design was used for sensor selectivity and sensitivity optimization.