Synthesis of flower-like cuo hierarchical nanostructures as an electrochemical platform for glucose sensing

Flower-like CuO hierarchical nanostructures were synthesized on copper foil substrate through a simple wet chemical route in alkaline media at room temperature. SEM images collected at different reaction times revealed the transformation of initially formed Cu(OH)(2) nanowires to flower-like CuO nanostructures. The hierarchical structure of the as-prepared CuO showed high electrocatalytic activity towards the oxidation of glucose making it a promising electrode material for the development of non-enzymatic glucose sensor. The amperometric sensor exhibited a wide linear response to glucose ranging from 4.5 x 10(-5) to 1.3 x 10(-3) mol L-1 (R (2) = 0.99317) at fixed potential of 0.3 V. The detection limit was 6.9 x 10(-6) mol L-1 (LOD = 3 sigma/s) with a sensitivity of 1.71 mu A mu mol(-1) cm(-2). Moreover, the developed sensor offers a fast amperometric response, good selectivity and stability.