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Room temperature crystallization of highly luminescent lanthanide-doped CaF2 in nanosized droplets: first example of the synthesis of metal halogenide in miniemulsion with effective doping and size control

机译:纳米液滴中高发光镧系元素掺杂CaF2的室温结晶:具有有效掺杂和尺寸控制的微乳液中金属卤化物合成的第一实例

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摘要

In this paper, we report the first successful preparation of calcium fluoride by miniemulsion. Calcium fluoride is a widely investigated material known to be an excellent host for luminescent lanthanide ions; herein we report an easy and reproducible way to achieve the controlled doping of CaF2 nanostructures (Ca : Ln = 50 : 1, with Ln = Sm-III, Gd-III and Tb-III) at room temperature, through the miniemulsion approach. The materials are thoroughly characterized from a structural, morphological and functional point of view, by the combined use of several techniques, i.e. X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Scanning and Transmission Electron Microscopy (SEM and TEM respectively) and photoluminescence (PL) spectroscopy. In addition, to get further insight into the local structure around the dopants, Extended X-ray Absorption Fine Structure (EXAFS) experiments are performed.
机译:在本文中,我们通过微乳液报告了首次成功地制备氟化钙。 氟化钙是已知是一种广泛研究的材料,其是发光镧系元素离子的优异宿主; 在此,通过微量乳液方法在室温下报告了实现CAF2纳米结构的受控掺杂(CA:Ln = 50:1,LN = SM-III,GD-III和TB-III)的容易和可重复的方法。 通过组合使用多种技术,即X射线衍射(XRD),X射线光电子能谱(XPS),电感耦合等离子体质谱(ICP-)(ICP-)彻底地表征了结构,形态学和功能的特征。 MS),扫描和透射电子显微镜(SEM和TEM)和光致发光(PL)光谱。 此外,为了进一步了解围绕掺杂剂的局部结构,进行延长的X射线吸收细结构(EXAFS)实验。

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