中文摘要：

用燃烧法制备了不同粒径的La2O3：Eu^3＋纳米微粒，研究了影响La2O3：Eu件纳米微粒大小的实验条件，发现粒径大小随甘氨酸（Gly）与稀土离子比例的增大而减小。制备的纳米微粒由谢乐公式计算的粒径尺寸为12-28nm。测量了样品的高分辨光谱。运用激光选择激发，研究了光谱在不同发光中心上的变化，表面态对于这些变化起着主要作用。

英文摘要：

La2O3 ： Eu^3＋ nanoparticles were prepared by Gly assistant combustion synthesis with the sizes from 12-28 nm, and a characterization of XRD was done. Spectral properties of the nanoparticles were compared with the bulk. High resolution spectra were measured. Site selective excitation was employed to probe the local environments of Eu^3＋ ions in La2O3 nanoparticles. The luminescent centers on the surface and the center of the nanoparticles were excited respectively. The spectra were related to surface information. The luminescence from C3v site and the site with lower symmetry on the surface was distinguished.