【作者】 关红霞； 宋艳华； 盛野； 郑克岩； 陈杰； 王越新； 张博雯； 邹海峰；

【Author】 Hongxia Guan;Yanhua Song;Ye Sheng;Keyan Zheng;Jie Chen;Yuexin Wang;Bowen Zhang;Haifeng Zou;College of chemistry, Jilin University;

【机构】 吉林大学化学学院；

【摘要】 首次采用精氨酸辅助水热法成功制备了Ba Gd F₅:Dy³⁺,Eu³⁺磁光双功能纳米材料,并对其结构和性能进行了表征。XRD分析表明,所得的样品为纯立方相的Ba Gd F5,结晶良好,微量Dy³⁺和Eu³⁺对Gd³⁺的取代没有改变Ba Gd F5的晶相结构。SEM照片表明:所合成的荧光粉尺寸大概为20 nm的纳米球。荧光光谱表明,Ba Gd F₅:Dy³⁺和Ba Gd F₅:Eu³⁺分别发射出明亮的蓝光和红光。此外,Ba Gd F₅:3%Dy³⁺,x%Eu³⁺（x=0,1,2,3,5,6,7,8,10）系列纳米粒子中存在Dy³⁺→Eu³⁺能量传递,经过计算证明为偶极-偶极相互作用。通过改变Dy³⁺和Eu³⁺的掺杂量或者调节不同的激发波长均可实现多色发光,发光颜色从蓝光向红光区移动,并可实现单一基质白光发射。此外,Ba Gd F₅:3%Dy³⁺,3%Eu³⁺纳米材料在常温（300 K）和低温（2K）下均表现出较好的磁性。因此,Ba Gd F₅:3%Dy³⁺,3%Eu³⁺纳米材料在彩色显示以及生物标签、生物分离和磁共振成像等生物领域具有潜在的应用前景。更多还原

【Abstract】 A series of Dy³⁺ or/and Eu³⁺ doped cubic Ba Gd F₅ phosphors were firstly synthesized by an L-arginine hydrothermal method and the structure and properties were characterized. XRD patterns show that the samples are cubic Ba Gd F₅ with better crystalline, and the Ba Gd F₅ crystal phase structure is not obviously changed with the co-doped of Dy³⁺and Eu³⁺. SEM images indicate that the morphologies of Dy³⁺-doped samples and Dy³⁺, Eu³⁺ co-doped Ba Gd F₅ nanomaterials are all nanspheres with the diameter of about 20 nm. Photoluminescence results show that the as-prepared Dy³⁺ or Eu³⁺ single doped Ba Gd F₅ show strong blue and red emission. In addition, in Ba Gd F₅:3%Dy³⁺, x%Eu³⁺（x=0, 1, 2, 3, 5, 6, 7, 8,10） system, there is energy transfer from Dy³⁺ to Eu³⁺ and the energy transfer migration is the dipole–dipole interaction. Based on the rare earth concentrations and excitation wavelengths, multiple（white, red, blue and green yellow） emissions are obtained by Eu³⁺ ion co-activated Ba Gd F₅:Dy³⁺ phosphors. Furthermore, the obtained samples also exhibit paramagnetic properties at room temperature（300K） and low temperature（2K）. It is obvious that Dy³⁺, Eu³⁺ co-doped Ba Gd F₅ nanomaterials with tunable multicolor emitting may have potential application in the fields of full-color displays and biological labels, bio-separation.更多还原