Unconventional Gallium Oxide Nanowires

Abstract Zigzag and helical β‐Ga₂O₃ one‐dimensional nanostructures were produced by thermal evaporation of gallium oxide in the presence of gallium nitride. High‐resolution TEM analysis indicates that each individual zigzag nanostructure has a periodic arrangement of three distinct blocks: two structurally perfect blocks mirrored with respect to each other on the (002) plane, and one stacking‐fault‐rich block sandwiched between them. In a zigzag nanostructure, the growth orientation of a β‐Ga₂O₃ crystal changes alternately in three blocks. The zigzag nanostructure as a whole has the [001] axial direction. In addition to zigzag nanostructures, single‐crystalline helical nanowires were also obtained.