Rajalakshmi M, Arora A K, Dash S, Tyagi A K
Materials Science Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
J Nanosci Nanotechnol. 2003 Oct;3(5):420-2. doi: 10.1166/jnn.2003.167.
Raman scattering investigations are carried out on nanocrystalline thorium oxide powders. Shift and broadening of the Raman peak associated with F2g phonons are observed for the nanocrystalline samples as compared with those of the bulk. The peak shift and broadening are found to increase further as the particle size decreases. A quantitative analysis of the Raman line shape is carried out with a Gaussian confinement model, and the estimated size is found to be consistent with that obtained from X-ray diffraction and transmission electron microscopy.
对纳米晶氧化钍粉末进行了拉曼散射研究。与块状样品相比，观察到纳米晶样品中与F2g声子相关的拉曼峰发生了位移和展宽。发现随着粒径减小，峰位移和展宽进一步增大。用高斯限制模型对拉曼线形进行了定量分析，发现估计尺寸与通过X射线衍射和透射电子显微镜获得的尺寸一致。
