Self-Assembled Metastable γ-Ga2O3 Nanofl owers with Hexagonal Nanopetals for Solar-Blind Photodetection

Metastable gamma-Ga2O3 nanoflowers assembled from hexagonal nanopetals are successfully constructed by the oxidation of metallic Ga in acetone solution. The nanoflowers with a hollow interior structure exhibit a short response time and a large light-current-dark-current ratio under a relatively low bias voltage, suggesting an especially important potential application in solar-blind photodetection.