4.6 Article

Synthesis of Hexagonal-Phase Core-Shell NaYF4 Nanocrystals with Tunable Upconversion Fluorescence

Journal

LANGMUIR
Volume 24, Issue 21, Pages 12123-12125

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/la802343f

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Funding

  1. A*STAR BMRC [R-397-000-624-305]
  2. National University of Singapore

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Hexagonal-phasecore-shell-structured NaYF4:Yb,Tm@beta-NaYF4:Yb,Er and beta-NaYF4:Yb,Tm@-NaYF4:Yb,Er@#NaYF4:Yb,Tm nanocrystals were synthesized by a seeded growth approach. beta-NaYF4:Yb,Tm nanocrystals with 20 nm diameter were used as seed crystals to induce the growth of beta-NaYF4:Yb,Er and then beta-NaYF4:Yb,Tm crystals, resulting in the formation of core-shell-structured nanocrystals with upconverting lanthanide ions Tm and Er doped in the core and shell, respectively.

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