Role of trivalent La and Nd dopants in lattice distortion and oxygen vacancy generation in cerium oxide nanoparticles

被引：179

作者：

Patil, Swanand

Seal, Sudipta

Guo, Yu

Schulte, Alfons

Norwood, John

机构：

[1] Univ Cent Florida, AMPAC, Nanosci Technol Ctr, Orlando, FL 32816 USA

[2] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA

[3] Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 24期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1063/1.2210795

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nanocrystalline Ce1-xRExO2-y (RE=La and Nd) powders were synthesized with a controlled size in the range of 3-5 nm using microemulsion technique. The nanoceria retains its cubic fluorite structures for the complete doping range. X-ray diffraction and Raman spectroscopic studies showed that the lattice distortion increased with the doping amount and was found to be higher for La-doped samples compared to the Nd doping. Spatial correlation model used for Raman analysis suggested increased defect concentration for the doped samples compared to nanoceria.

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页数：3

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