ZnO-CuO core-shell radial heterojunction nanowire arrays were fabricated by a straightforward approach which combine two simple, cost effective and large-scale preparation methods: (i) thermal oxidation in air of a zinc foil for obtaining ZnO nanowire arrays and (ii) radio frequency magnetron sputtering for covering the surface of the ZnO nanowires with a CuO thin film. The structural, compositional, morphological and optical properties of the high aspect ratio ZnO-CuO core-shell nanowire arrays were investigated. Individual ZnO-CuO core-shell nanowires were contacted with Pt electrodes by means of electron beam lithography technique, diode behaviour being demonstrated. Further it was found that these n-p radial heterojunction diodes based on single ZnO-CuO nanowires exhibit a change in the current under UV light illumination and therefore behaving as photodetectors.
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| http://dx.doi.org/10.1038/s41598-019-42060-w | DOI Listing |
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