No abstract

CuCo 2 O 4 nanowire arrays supported on carbon cloth (CuCo 2 O 4 NWAs/CC) were prepared via a simple hydrothermal synthesis and subsequent calcination process. As a 3D binder-free electrode for nonenzymatic glucose sensing, CuCo 2 O 4 NWAs/CC shows high sensing performance towards glucose under alkaline conditions, with a wide detection range from 1 mM to 0.93 mM, a low detection limit of 0.5 mM (S/N ¼ 3), and a high detection sensitivity of 3.93 mA mM À1 cm À2. Moreover, CuCo 2 O 4 NWAs/CC shows good selectivity in the presence of common interferents and good reproducibility for glucose detection, which make it a promising electrode material for sensitive determination of glucose in human samples.

Hierarchical Cu/Cu(OH)2 nanorod arrays grown on Cu foam (Cu/Cu(OH)2 NRA/CF) were prepared via a three-step strategy involving the synthesis of Cu(OH)2 NRA/CF, the preparation of Cu NRA/CF, and the growth of Cu(OH)2 nanoparticles on Cu NRA/CF.

Commercially available copper foam (CF) was used as a 3D porous electrochemical sensing platform for nonenzymatic glucose detection. CF shows high electrocatalytic activity towards glucose oxidation and can be used directly for glucose electrochemical sensing without any pretreatment. The sensor exhibits high performance towards glucose in 0.1 M NaOH solution with the linear range from 1 μM to 0.5 mM, the sensitivity of 5.85 mA mM−1 cm−2 and the detection limit of 0.5 μM (S/N=3) simultaneously. Furthermore, the sensor shows a high selectivity for glucose against the common interferences and good reliability for glucose detection in human serum samples.