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Nanoporous CuO layer on Cu foil with a thick Cu 2 O interlayer is synthesized via post annealing of previously fabricated Cu(OH) 2 nanowires at 500 °C under an oxygen flow. The formation of the thick sandwiched Cu 2 O layer is realized through the outward diffusion of Cu ions and subsequent oxidation. An O 2 pressure above the dissociation pressure of CuO is used to form a CuO layer at the outer surface of the structure, thus realizing a low cost structure having a porous and high isoelectric point layer. The Cu/Cu 2 O/CuO structure is used as an efficient electrode for glucose sensing. Sensitivities of ##IMG## [http://ift.tt/1GcZtPh] {$20.7;{rm mA};{rm m}{{{rm M}}^{-1}};{rm c}{{{rm m}}^{-2}}$} at 0.8 V versus Ag/AgCl and 1066 μ A mM –1 cm –2 at 0.6 V versus Ag/AgCl are achieved in an enzymatic and non-enzymatic glucose …

Changli Li, Mario Kurniawan, Dali Sun, Hitoshi Tabata and Jean-Jacques Delaunay

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