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超细YF3与GdF3纳米晶的合成及其上转换发光
引用本文:于锋,黄周霞,马蓦,徐昌富,林建国. 超细YF3与GdF3纳米晶的合成及其上转换发光[J]. 无机化学学报, 2013, 29(18)
作者姓名:于锋  黄周霞  马蓦  徐昌富  林建国
作者单位:湘潭大学材料与光电物理学院, 湘潭 411105;湘潭大学材料与光电物理学院, 湘潭 411105;湘潭大学材料与光电物理学院, 湘潭 411105;湘潭大学材料与光电物理学院, 湘潭 411105;湘潭大学材料与光电物理学院, 湘潭 411105
摘    要:当使用液固溶法(LSS法)制备分散性纳米晶时,将传统油酸/油酸钠/酒精反应体系中的NaOH用氨水取代时,氨水将会与油酸形成新的表面活性剂油酸铵,这样就可以合成各种超细分散性的REF3纳米晶(RE代表稀土元素)。在这种新的反应体系中,合成了平均直径小于10nm的YF3和GdF3超细颗粒,X射线与透射电镜测试表明YF3是正交相,而GdF3是面心立方结构,空间群为Fm3m,晶格常数为0.5829nm。在980nm半导体激光器激发下,可检测到YF3:Yb/Er在515~570nm处有较强的绿色发光峰、645~675nm处有较强的红色发光峰,呈橙色发光。YF:Yb/Tm和GdF3:Yb/Tm样品在460~490nm处有较强的蓝色发光峰,而在800nm附近有更强的近红外发光峰。由于其超细的尺寸及红外上转换发光特性,合成的样品在生物成像,生物标签等方面有潜在的应用价值。

关 键 词:YF3/GdF3超细纳米晶  LSS法  上转换

Synthesis and Upconversion Luminescence of Ultrasmall YF3 and GdF3 Nanocrystallines
YU Feng,HUANG Zhou-Xi,MA Mo,XU Chang-Fu and LIN Jian-Guo. Synthesis and Upconversion Luminescence of Ultrasmall YF3 and GdF3 Nanocrystallines[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(18)
Authors:YU Feng  HUANG Zhou-Xi  MA Mo  XU Chang-Fu  LIN Jian-Guo
Affiliation:Institute of Material&Photoelectronic Physics, Xiangtan University, Xiangtan, Hunan, 411105, China;Institute of Material&Photoelectronic Physics, Xiangtan University, Xiangtan, Hunan, 411105, China;Institute of Material&Photoelectronic Physics, Xiangtan University, Xiangtan, Hunan, 411105, China;Institute of Material&Photoelectronic Physics, Xiangtan University, Xiangtan, Hunan, 411105, China;Institute of Material&Photoelectronic Physics, Xiangtan University, Xiangtan, Hunan, 411105, China
Abstract:In liquid-solid-solution (LSS) method, when NaOH in the traditional oleic acid/sodium oleate/alcohol reaction system was replaced by ammonia, ammonia reacted with oleic acid, and then a new kind surfactant generated. So, this method can be used to synthesize monodispersed ultrasmall REF3 nanocrystals. In this new reaction system, ultrasmall YF3 and GdF3 nanocrystals have been synthesized. X-ray diffraction (XRD) and transmission electron microscopy (TEM) assays revealed that the as-synthesized YF3 was orthorhombic structure, but GdF3 was face-centered cubic phase (S. G.:Fm3m, lattice constant: 0.5829 nm). Under the excitation of 980 nm diode laser, strong green photoluminescence at 515~570 nm and strong red emission at 645~675 nm of YF3:Yb/Er were detected, so the luminescent color of YF3:Yb/Er nanocrystals presented orange. Intense blue emission peaks at 460~490 nm from YF3:Yb/Tm and GdF3:Yb/Tm nanocrystals were detected, especially the stronger near-infrared photoluminescence peaks near 800 nm. For the ultrasmall size and its relative strong upconversion luminescence, the as-synthesized samples show potential applications in bioimaging, biolabels and etc.
Keywords:YF3/GdF3 ultrasmall nanocrystals  LSS method  upconversion
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