Selected synthesis of cubic and hexagonal NaYF4 crystals via a complex-assisted hydrothermal route

被引：86

作者：

Wang, ZJ ^{[1
]}

Tao, F ^{[1
]}

Yao, LZ ^{[1
]}

Cai, WL ^{[1
]}

Li, XG ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China

来源：

JOURNAL OF CRYSTAL GROWTH | 2006年 / 290卷 / 01期

关键词：

crystal morphology; hydrothermal crystal growth; NaYF4;

D O I：

10.1016/j.jcrysgro.2006.01.012

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Cubic nano-spheres and hexagonal microprisms of sodium yttrium tetrafluoride (NaYF4) have successfully been prepared separately via a mild hydrothermal route. The morphology and the structure of the NaYF4 crystals can be changed by adjusting the Y3+/F- ratio in the reaction solution. Cubic NaYF4 nano-spheres are synthesized when the Y3+/F- ratio is stoichiometric; while hexagonal NaYF4 microprisms appear as excess F- is present at 180 degrees C for more than 5 h. Ethylenediamine tetra-acetic acid (EDTA) plays an important role as a chelating ligand, and F- acts as both a reactant and a mineralizer during the synthesis process. A growth mechanism is discussed. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：296 / 300

页数：5

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