Controlled fabrication and optical properties of 3D hierarchical α-Bi2O3 siamesed microflowers

• Synthesis of 3D hierarchical α-Bi2O3 siamesed microflowers by a glycerin-assisted hydrothermal method.
• Hierarchical microstructures constructed by nanoribbons, ultrathin nanoflakes and oblique prism-like nanorobs can be found in reaction.
• The growth mechanism of combination of two steps of self-assembly is proposed.

Three dimensional (3D) hierarchical α-Bi2O3 siamesed microflowers have been synthesized by a glycerin-assisted hydrothermal method. The microflowers of 30 μm were built up of oblique prism-like nanorobs, with mean width of 300 nm and thickness of 100 nm. In the hydrothermal process, hierarchical microstructures constructed by nanoribbons, ultrathin nanoflakes and oblique prism-like nanorobs can be found at different step of crystal growth. Morphology evolution of α-Bi2O3 was analyzed and the probable formation mechanism was proposed based on experimental results. The vibrational properties, optical absorption and photoluminescence (PL) characteristics of the sample were investigated.

Three dimensional (3D) hierarchical α-Bi2O3 siamesed microflowers of 30 μm built up of oblique prism-like nanorobs were synthesized by a glycerin-assisted hydrothermal method. The formation mechanism of this kind of microstructure is combination of two steps of self-assembly.Figure optionsDownload as PowerPoint slide