Synthesis of self-assembled α-GaOOH microrods and 3D hierarchical architectures with flower like morphology and their conversion to α-Ga₂O₃

This report reveals the methodology for the fabrication of α-GaOOH micro rods and micro flowers from gallium nitrate with two different complexing agents. α-GaOOH self-assembled 3D hierarchical architecture, comprising of nanorods and nanoribbbons with a flower like morphology, is fabricated under benign hydrothermal conditions. Calcination of α-GaOOH results in formation of α-Ga₂O₃ with the retention of morphology. Both gallium oxyhydroxide and gallium oxide microstructures were analyzed with SEM, EDX, TEM and powder X-ray diffraction. α-Ga₂O₃ micro flowers are furnished with nanorods having ordered diamond like cross section with a diagonal length proportion of 2:1. The hydrothermally fabricated GaOOH and their calcinated products (Ga₂O₃) were phase pure.