Synthesis, characterization, and photoluminescence of β-Ga2O3 nanofibers

Gallium oxide nanofibers were synthesized by reactive pulsed laser ablation of 99.99% pure GaN target in vacuum condition. The nanofibers have been identified to be β-Ga2O3 by X-ray diffraction and selected area diffraction. The structure and composition of the as-deposited product were determined by high-resolution transmission electron microscopy and scanning electron microscopy. The β-Ga2O3 nanofibers have diameters in the range of 10 - 20 nm and lengths up to tens of microns. Photoluminescence measurements at temperature between 10 K and room temperature show that the nanofibers emit stable and high brightness UV and blue light at 390 nm and 440 nm respectively under the excitation of 325 nm laser source which my find potential applications in one-dimensional optoelectronics nanodevices.