Monoclinic Ga2O3 nanobelts and nanosheets were obtained by a simple chemical route involved with H2O at 950C in Ar atmosphere. Electron microscopy observations revealed that the as-synthesized Ga2O3 nanobelts and nanosheets were structurally uniform, single crystalline, and most of them were free of defects and dislocations. The nanobelts were growing along with [001] facets, and the nanosheets were stacked up by (011) facets. The Raman scattering spectrum of Ga2O3 nanostructures showed a 30/cm red-shift at high wave-numbers in comparison with that of bulk Ga2O3 powder. The photoluminescence spectrum reveals that there exists a stable blue emission band centered at 460nm, which was mainly attributed to the O vacancies in the Ga2O3 nanostructures.

Growth and Optical Characterization of Ga2O3 Nanobelts and Nanosheets. L.Dai, X.L.Chen, X.N.Zhang, A.Z.Jin, T.Zhou, B.Q.Hu, Z.Zhang: Journal of Applied Physics, 2002, 92[2], 1062-4