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题名: Synthesis, characterization, and biological application of size-controlled nanocrystalline NaYF4 : Yb,Er infrared-to-visible up-conversion phosphors
作者: Yi, GS; Lu, HC; Zhao, SY; Yue, G; Yang, WJ; Chen, DP; Guo, LH
刊名: NANO LETTERS
出版日期: 2004
卷号: 4, 期号:11, 页码:2191-2196
DOI: 10.1021/nl048680h
部门归属: 环境化学与生态毒理学国家重点实验室
英文摘要: Nanocrystalline infrared-to-visible up-conversion phosphors, ytterbium and erbium co-doped sodium yttrium fluoride, were synthesized. Spherical particles with narrow size distribution were prepared by a co-precipitation method in the presence of ethylenediaminetetraacetic acid (EDTA). Particles of controlled size in the range of 37 to 166 nm diameter were obtained by adjusting the molar ratio of EDTA to total lanthanides. Although the as-prepared nanoparticles emit very weak up-conversion fluorescence when excited by infrared light, the emission was enhanced by up to 40-fold after they were annealed at temperatures between 400 and 600 degreesC. By comparison with the bulk phosphor, the luminescence efficiency of the nanoparticle was estimated to be 1%. Factors affecting the particle size and their up-conversion fluorescence intensity were investigated by various microscopic and spectroscopic techniques. Preliminary results demonstrated the nanoparticles as promising up-converting fluorescence labels in the detection of biological interactions.
研究领域[WOS]: Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS记录号: WOS:000225115700022
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/23489
Appears in Collections:环境化学与生态毒理学国家重点实验室_期刊论文

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文件名: Synthesis, Characterization, and Biological Application of Size-Controlled Nanocrystalline NaYF4Yb,Er Infrared-to-Visible Up-Conversion Phosphors .pdf
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