Systematic synthesis of lanthanide phosphate nanocrystals

被引：113

作者：

Huo, Ziyang ^{[1
]}

Chen, Chen ^{[1
]}

Chu, Deren ^{[1
]}

Li, Haohang ^{[1
]}

Li, Yadong ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2007年 / 13卷 / 27期

关键词：

hydrothermal synthesis; lanthanides; luminescence; nanostructures; phosphates;

D O I：

10.1002/chem.200601727

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Uniform LnPO(4)center dot xH(2)O (Ln = Y, La-Nd, Sm-Lu) nanocrystals that have controllable OD (spherelike), ID (rodlike), and 2D (polygonlike) structures have been systematically synthesized by means of a hydrothermal method by using, a mixed solvent of water and ethanol. Transmission electron microscopy images and SEAD (selected area electron diffraction) patterns revealed that the products are highly crystalline and have structurally uniform shapes. IR, Raman, and electron energy loss spectroscopies gave spectra that indicated that an amount of oleic acid molecules were presented at the surface of individual nanocrystals. These nanocrystals have hydrophobic surfaces and could be easily dispersed in nonpolar solvents. Moreover, a creditable synthetic mechanism for nucleation, growth, and shape evolution has been proposed. Eu3+ doped products were also prepared by using the same synthetic process. The Eu3+ doped products exhibited an orange-red luminescence that is ascribed to an electron transition within the 4f shell. Analysis of the photoluminescent spectra revealed that the optical properties are strongly dependent on their morphologies.

引用

页码：7708 / 7714

页数：7

共 41 条

[1] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[2]

[Anonymous], ANGEW CHEM

[3] Spin-dependent tunneling in self-assembled cobalt-nanocrystal superlattices [J].

Black, CT ;

Murray, CB ;

Sandstrom, RL ;

Sun, SH .

SCIENCE, 2000, 290 (5494) :1131-1134

[4] Synthesis of colloidal upconverting NaYF4 nanocrystals doped with Er3+, Yb3+ and Tm3+, Yb3+ via thermal decomposition of lanthanide trifluoroacetate precursors [J].

Boyer, John-Christopher ;

Vetrone, Fiorenzo ;

Cuccia, Louis A. ;

Capobianco, John A. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (23) :7444-7445

[5] One-step synthesis of FePt nanoparticles with tunable size [J].

Chen, M ;

Liu, JP ;

Sun, SH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (27) :8394-8395

[6] Systematic synthesis and characterization of single-crystal lanthanide orthophosphate nanowires [J].

Fang, YP ;

Xu, AW ;

Song, RQ ;

Zhang, HX ;

You, LP ;

Yu, JC ;

Liu, HQ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (51) :16025-16034

[7] Size dependent efficiency in Tb doped Y2O3 nanocrystalline phosphor [J].

Goldburt, ET ;

Kulkarni, B ;

Bhargava, RN ;

Taylor, J ;

Libera, M .

JOURNAL OF LUMINESCENCE, 1997, 72-4 :190-192

[8] Self-assembly of uniform hexagonal yttrium phosphate nanocrystals [J].

Huo, Ziyang ;

Chen, Chen ;

Li, Yadong .

CHEMICAL COMMUNICATIONS, 2006, (33) :3522-3524

[9] OPTICAL ABSORPTION INTENSITIES OF RARE-EARTH IONS [J].

JUDD, BR .

PHYSICAL REVIEW, 1962, 127 (03) :750-&

[10] Synthesis of Eu3+-doped core and core/shell nanoparticles and direct spectroscopic identification of dopant sites at the surface and in the interior of the particles [J].

Lehmann, O ;

Kömpe, K ;

Haase, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (45) :14935-14942

← 1 2 3 4 5 →