Abstract
We have prepared gallium oxide nanowires and investigated the effect of thermal annealing on the structural and optical properties. As-prepared and annealed nanowires, respectively, were found to be fully amorphous and amorphous with very small crystallites. Photoluminescence measurements indicated that both as-prepared and annealed nanowires under excitation at 250 nm showed two emission band at 364 and 466 nm but the relative peak intensities of UV and blue emission, respectively, increase and decrease by the thermal annealing.
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