Facile synthesis and up-conversion properties of monodisperse rare earth fluoride nanocrystals

被引：39

作者：

Gai, Shili ^{[1
]}

Yang, Guixin ^{[1
]}

Li, Xingbo ^{[1
]}

Li, Chunxia ^{[2
]}

Dai, Yunlu ^{[2
]}

He, Fei ^{[1
]}

Yang, Piaoping ^{[1
]}

机构：

[1] Harbin Engn Univ, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

来源：

DALTON TRANSACTIONS | 2012年 / 41卷 / 38期

基金：

高等学校博士学科点专项科研基金;

关键词：

DOPED NAYF4 NANOCRYSTALS; OPTICAL-PROPERTIES; FLUORESCENT NANOPARTICLES; HYDROTHERMAL SYNTHESIS; LAF3; NANOPARTICLES; CRYSTAL-STRUCTURES; BIOLOGICAL LABELS; CANCER-DIAGNOSIS; LANTHANIDE IONS; HEXAGONAL-PHASE;

D O I：

10.1039/c2dt30954h

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Monodisperse rare earth (RE) fluoride colloidal nanocrystals (NCs) including REF3 (RE = La, Pr, Nd), NaREF4 (RE = Sm-Ho, Y) and Na5RE9F32 (RE = Er, Yb, Lu) have been successfully synthesized by a facile one-step method using oleic acid as surfactant and 1-octadecene as solvent. The phase, morphology, size, and photoluminescence properties of as-synthesized NCs were well investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FT-IR), and photoluminescence (PL) spectra. The results reveal that the as-synthesized NCs consist of monodisperse colloidal NCs with narrow size distribution, which can easily disperse in non-polar cyclohexane solvent. The as-prepared NCs exhibit a rich variety of morphologies and different crystal phases (hexagonal or cubic), which may be related to the inherent natures of different rare earth ions. The possible formation mechanism of NCs with diverse architectures has been presented. In addition, representative Yb/Er, Yb/Tm, or Yb/Ho co-doped NaGdF4 and Na5Lu9F32 NCs exhibit intensive multicolor up-conversion (UC) luminescence under a single 980 nm NIR excitation, displaying potential applications in bioimaging and therapy. Moreover, transparent and UC fluorescent NCs-polydimethylsiloxane (PDMS) composites with regular dimensions were also prepared by an in situ polymerization route.

引用

页码：11716 / 11724

页数：9

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