东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (2): 232-235.DOI: -

• 论著 • 上一篇    下一篇

NaYF_4:Yb;Er上转换荧光纳米颗粒的合成及表面修饰

王猛;刘金玲;密丛丛;徐淑坤;   

  1. 东北大学理学院;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-02-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(20635010,20875011);;

Synthesis and surface modification of NaYF4:Yb, Er upconversion fluorescent nanoparticles

Wang, Meng (1); Liu, Jin-Ling (1); Mi, Cong-Cong (1); Xu, Shu-Kun (1)   

  1. (1) School of Sciences, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-02-15 Published:2013-06-20
  • Contact: Xu, S.-K.
  • About author:-
  • Supported by:
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摘要： 以稀土硬脂酸盐为前驱体,利用热分解法在液体石蜡-油酸体系中合成出具有较高发光强度的NaYF4∶Yb,Er上转换荧光纳米颗粒.通过透射电子显微镜(TEM)、X射线衍射(XRD)、红外光谱(FT-IR)以及荧光光谱对纳米颗粒进行了表征,推断出该合成反应的机理为固-液两相反应.详细探讨了反应时间、温度以及溶剂组成对纳米颗粒荧光性能的影响.通过Lemieux-von Rudloff试剂将包覆有油酸分子的纳米颗粒表面羧基化修饰,使纳米颗粒具有良好的水溶性.

关键词: 上转换, 荧光纳米材料, 稀土, NaYF4, 表面修饰

Abstract: NaYF4:Yb, Er upconversion nanoparticles with strong fluorescent intensity were synthesized in the liquid paraffin-oleic acid system via a thermolysis method, with the rare earth stearate used as precursor. The as-prepared nanoparticles were characterized by TEM, XRD, FT-IR and luminescence spectroscopy. It was inferred that the mechanism of the synthesis is of a solid-liquid two-phase reaction. The effects of reaction time, temperature and solvent composition on the fluorescent performance of the nanoparticles were discussed in detail. As a result, the oleic acid-coated hydrophobic nanoparticles became highly hydrophilic after their surfaces were modified with carboxylic groups by use of the Lemieux-von Rudloff reagent.

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