Synthesis of Yb/Er Doped NaYF₄ Nanoparticles with Intense Green up-Conversion Emission

Abstract:

The luminescent rare-earth nanomaterials have great potential in the biological and biomedical applications due to their unique optical characteristics. An infrared-to-visible up-conversion NaYF₄: Yb³⁺, Er³⁺ nanoparticle was synthesized by hydrothermal method. More intense green up-conversion luminescence was obtained due to using citrate as a chelator. Different sizes of up-conversion particles (UCNPs) in the range of 40 to 1000 nm were available by adjusting the molar ratio of fluoride to Ln³⁺. The UCNPs were coated by silica and functionalized with amino groups for a conjugation with biomolecules. The UCNPs prepared might be promising for bioassay, bioimaging and diagnostics, especially in vivo environment and living cells.

• Periodical: Advanced Materials Research (Volume 365)
• Pages: 287-291
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.365.287
• Online since: October 2011
• Authors: Fu Sen Li, Yang Chen
• Keywords: Er³⁺, Hydrothermal Synthesis Method, Nanoparticle, NaYF₄:Yb³⁺, Up-Conversion

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