Synthesis, Characterization, and Biological Application of Size-Controlled Nanocrystalline NaYF4:Yb,Er Infrared-to-Visible Up-Conversion Phosphors | Zendy

Guangshun Yi | Zendy; Huachang Lu | Zendy; Shuying Zhao | Zendy; Yue Ge | Zendy; Wenjun Yang | Zendy; Depu Chen | Zendy; LiangHong Guo | Zendy

Open Access

Synthesis, Characterization, and Biological Application of Size-Controlled Nanocrystalline NaYF₄:Yb,Er Infrared-to-Visible Up-Conversion Phosphors

Author(s) -

Guangshun Yi,

Huachang Lu,

Shuying Zhao,

Yue Ge,

Wenjun Yang,

Depu Chen,

LiangHong Guo

Publication year - 2004

Publication title -

nano letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.853

H-Index - 488

eISSN - 1530-6992

pISSN - 1530-6984

DOI - 10.1021/nl048680h

Subject(s) - phosphor , yttrium , nanocrystalline material , materials science , particle size , nanoparticle , luminescence , infrared , fluorescence , analytical chemistry (journal) , ethylenediaminetetraacetic acid , lanthanide , ytterbium , doping , nanotechnology , chemistry , optics , optoelectronics , ion , chelation , chromatography , physics , organic chemistry , metallurgy , oxide

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.

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