Electrochemical determination of NADH based on MPECVD carbon nanosheets

► The MPECVD CNSs are firstly employed as electrode material for detecting NADH. ► The CNSs show their intrinsic electrochemical properties as sensors. ► The CNSs exhibit excellent performances in detecting NADH. ► Low detection voltage and limit, high sensitivity, selectivity and repeatability. ► The approach is very simple and time-saving modification.