High-quality sodium rare-earth fluoride nanocrystals: Controlled synthesis and optical properties

被引：1319

作者：

Mai, Hao-Xin

Zhang, Ya-Wen ^{[1
]}

Si, Rui

Yan, Zheng-Guang

Sun, Ling-Dong

You, Li-Ping

Yan, Chun-Hua

机构：

[1] State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China

[2] Peking Univ, PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Che, Beijing 100871, Peoples R China

[3] Peking Univ, Electron Microscopy Lab, Beijing 100871, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2006年 / 128卷 / 19期

关键词：

D O I：

10.1021/ja060212h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a general synthesis of high-quality cubic (alpha-phase) and hexagonal (beta-phase) NaREF4 (RE: Pr to Lu, Y) nanocrystals (nanopolyhedra, nanorods, nanoplates, and nanospheres) and NaYF4: Yb,Er/Tm nanocrystals (nanopolyhedra and nanoplates) via the co-thermolysis of Na(CF3COO) and RE(CF3COO)(3) in oleic acid/oleylamine/1-octadecene. By tuning the ratio of Na/RE, solvent composition, reaction temperature and time, we can manipulate phase, shape, and size of the nanocrystals. On the basis of its alpha ->beta phase transition behavior, along the rare-earth series, NaREF4 can be divided into three groups (I: Pr and Nd; II: Sm to Tb; III: Dy to Lu, Y). The whole controlled-synthesis mechanism can be explained from the point of view of free energy. Photoluminescent measurements indicate that the value of I-610/I-590 and the overall emission intensity of the NaEuF4 nanocrystals are highly correlative with the symmetries of the Eu3+ ions in both the lattice and the surface.

引用

页码：6426 / 6436

页数：11

共 52 条

[1] Shape-controlled synthesis of colloidal platinum nanoparticles [J].