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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.

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