Synthesis and upconversion luminescence of NaYF 4:Yb, Tm/TiO 2 core/shell nanoparticles with controllable shell thickness

Daisheng Zhang, Dan Zhao, Kezhi Zheng, Ning Liu, Weiping Qin

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

NaYF 4:Yb, Tm/TiO 2 core/shell nanoparticles were synthesized by a two-step method. First, the NaYF 4:Yb, Tm nanocrystals were prepared using solvothermal technology; then, TiO 2 shells were deposited on the nanocrystals by the hydrolysis of titanium ethoxide (TEOT) to form core/shell structures. By controlling the reaction time, we can adjust the thickness of TiO 2 shell and thereby the weight percentage of TiO 2 in the core/shell nanoparticles. The effect of shell thickness on the upconversion fluorescence of NaYF 4:Yb, Tm nanocrystals was investigated in detail.

Original languageEnglish
Pages (from-to)9761-9764
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number11
DOIs
StatePublished - 2011
Externally publishedYes

Keywords

  • Core/Shell
  • NaYF
  • Rare Earth
  • TiO
  • Upconversion Luminescence

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