Figure 4

(a) Real-time detection of H₂O₂ with increasing concentrations in PBS buffer with the MoS₂/RGO FET sensor (red line) and the RGO FET sensor (blue line). (b) The calibration curve of MoS₂/RGO FET sensor to a series of H₂O₂ concentrations. Error bars represent standard deviations of measurements (n = 3). (c) Selectivity measurement with the addition of a series of interferents (PBS, 1 mM AA, 1 mM UA, 1 mM Glu, 1 mM GLY, 1 mM NE, 1 mM L-GA,) followed by 1 μM H₂O₂ solutions. (d) Histogram of the current change of the MoS₂/RGO sensor to PBS, AA, UA, Glu, GLY, NE, L-GA and H₂O₂, respectively.