11:00 AM - 12:00 AM
Chun-Hua Yan, Beijing National Laboratory, China
Chemical Sciences Division Seminar
Chemical and Material Sciences Building (4100), Room C-301
Email: Sheng DaiPhone:
In this talk, several typical rare earth nanomaterials are selected to demonstrate the coordination effect on the control of structure/microstructure/texture, surface/interface, particle size and morphology. With using some solution-based methods including solvothermal treatment and the thermolysis of metal complex precursors, a series of novel nanostructured rare earth compounds, such as ultra-small colloidal ceria nanoparticles, highly homogenous and stable ceria-zirconia solid solutions, and high-quality rare earth oxide and fluoride nanocrystals, etc., have been prepared by elaborately controlling the synthetic parameters and reaction kinetics. The assembly of the rare earth nanocrystals has also been studied. In order to reveal the mechanisms of synthesis and properties, the phase, microstructure, texture, and surface state have been characterized systematically. It is demonstrated that these rare earth nanocrystals could serve as good candidates for wide applications such as UV-absorbents, three way catalysts, high efficiency up-conversion phosphors and biolabel materials.