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Here we report Cu/Cu2O nanocomposites prepared via potential oscillation. High resolution transmission electron microscopy images reveal a homogeneous distribution of Cu and Cu2O in the composite. Due to the synergistic effect between Cu and Cu2O, the nanohybrids show much lower resistivity and higher glucose oxidation activity (a lower over-potential and higher current-output) compared to the Cu2O counterpart. As an example of application, a nanocomposite-based electrode is employed for a nonenzymatic glucose biosensor application, and exhibits a linear detection upper limit of 40 mM, a sensitivity of 1434.12 μA cm−2 mM−1, and good selectivity. [ABSTRACT FROM AUTHOR]

Developing nanostructured electrocatalysts, with low overpotential, high selectivity and activity has fundamental and technical importance in many fields. We report here rhodium nanoparticle and mesoporous silicon nanowire (RhNP@mSiNW) hybrids for hydrogen peroxide (H2O2) detection with high electrocatalytic activity and selectivity. By employing electrodes that loaded with RhNP@mSiNW nanohybrids, interference caused from both many electroactive substances and dissolved oxygen were eliminated by electrochemical assaying at an optimal potential of +75 mV. Furthermore, the electrodes exhibited a high detection sensitivity of 0.53 μA/mM and fast response (< 5 s). This high-performance nanohybrid electrocatalyst has great potential for future practical application in various oxidase-base biosensors. [ABSTRACT FROM AUTHOR]

Here we report Cu/Cu 2 O nanocomposites prepared via potential oscillation. High resolution transmission electron microscopy images reveal a homogeneous distribution of Cu and Cu 2 O in the composite. Due to the synergistic effect between Cu and Cu 2 O, the nanohybrids show much lower resistivity and higher glucose oxidation activity (a lower over-potential and higher current-output) compared to the Cu 2 O counterpart. As an example of application, a nanocomposite-based electrode is employed for a nonenzymatic glucose biosensor application, and exhibits a linear detection upper limit of 40 mM, a sensitivity of 1434.12 μA cm -2 mM -1 , and good selectivity.