Key Words:Nickel sulfide nanowormsPEDOT-rGO hybrid filmsElectrocatalytic activityBinder-free sensorNon-enzymatic glucose sensorHuman serum analysis
Abstract:Nickel sulfide nanoworm (Ni3S2 NW) network architecture was directly grown on the poly (3,4-ethylenedioxythiophene)-reduced graphene oxide hybrid films (PEDOT-rGO HFs) modified on glassy carbon electrode (GCE), acting as a binder-free sensor for high-performance non-enzymatic glucose monitoring. The sensor exhibited the satisfactory sensitivity (2123 mu A mM(-1) cm(-2)), wide linear range (15 similar to 9105 mu M), low detection limit (0.48 mu M), and rapid response time (< 1.5 s) at a potential of 0.5 V (vs. SCE) in 0.1 M NaOH and possessed good selectivity, reproducibility, and stability. The enhanced electrocatalytic activity of the sensor towards glucose oxidation was attributed to the particular morphology, satisfying hydrophilic nature, strong combination between Ni3S2 NWs, PEDOT-rGO, and bare GCE. Moreover, it can be used for assaying glucose in human serum samples without dilution, indicating potential for clinical diagnostic applications.
Volume:188
Issue:2
Translation or Not:no