Abstract

A facile one-step hydrothermal route for the synthesis of core/shell-type ZnO/ZnSe nanorods was reported. The ZnSe nanoparticle-coated ZnO nanorods were successfully fabricated via a hydrothermal reaction of Zn with Na 2SeO 3 and HCl solution at 180 °C for 24 h. The as-prepared ZnO nanorod/ZnSe nanoparticle composites were characterized by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy. The results show that these core/shell-type ZnO/ZnSe nanorods have lengths of about 5 μm. The coated ZnSe nanoparticles are a polycrystal with the cubic structure of the zinc-blende type, and the ZnO nanorods are a single crystal with a hexagonal structure of the wurtzite type. A possible mechanism was also proposed to account for the formation of core/shell-type ZnO/ZnSe nanorods.

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