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We present Al2O3-ZnAl2O4-ZnO nanostructure, which could be a prominentcandidate for optoelectronics, mechanical and sensing applications. While ZnOand ZnAl2O4 composites are mostly synthesized by sol-gel technique, we proposea solid-vapor growth mechanism. To produce Al2O3-ZnAl2O4-ZnO nanostructure, weconduct ZnO:C powder heating resulting in ZnO nanowires (NWs) growth onsapphire substrate and ZnAl2O4 spinel layer at the interface. The nanostructurewas examined with Scanning Electron Microscopy (SEM) method. Focused Ion Beam(FIB) technique enabled us to prepare a lamella for Transmission ElectronMicroscopy (TEM) imaging. TEM examination revealed high crystallographicquality of both spinel and NW structure. Epitaxial relationships ofAl2O3-ZnAl2O4 and ZnAl2O4-ZnO are given.

ZnO nanowires grown on Al2O3-ZnAl2O4 nanostructure using solid-vapor mechanism