facile synthesis and electrochemical performance of graphene-modified cu2o nanocomposite for use in enzyme-free glucose biosensor

Graphene-modified cu2o nanocomposite was synthesized under facile microwave irradiation of an aqueous solution and has been investigated as an enzyme-free glucose biosensor. morphology and crystal structure of the graphene-modified cu2o nanocomposite were investigated by using electron microscopy and x-ray diffraction (xrd) analyses. also, the electrochemical performance of the graphene-modified cu2o nanocomposite for the measurement of glucose concentration in alkaline media was evaluated by using cyclic voltammetry and chronoamperometric measurements. the electrochemical studies revealed that graphene-modified nanocomposite electrode exhibited a high performance for non-enzymatic oxidation of glucose with a desirable sensitivity. also, the fabricated graphene-modified biosensor exhibited a wide linear response for glucose detection in the concentrations ranges from 2 μm to 12 mm and a desirable detection limit of 2 μm. also, the graphene-modified cu2o nanocomposite provided an appropriate selective response for glucose detection in the presence of high concentrations of ascorbic acid and dopamine.