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Optics and Spectroscopy

, Volume 118, Issue 4, pp 609–613 | Cite as

Determination of the refractive index of β-NaYF4/Yb3+/Er3+/Tm3+ nanocrystals using spectroscopic refractometry

  • V. I. SokolovEmail author
  • A. V. Zvyagin
  • S. M. Igumnov
  • S. I. Molchanova
  • M. M. Nazarov
  • A. V. Nechaev
  • A. G. Savelyev
  • A. A. Tyutyunov
  • E. V. Khaydukov
  • V. Ya. Panchenko
Physical Optics

Abstract

A method for measuring refractive index n of nanosize particles in the visible and near-IR spectral ranges is proposed. The method is based on comparing refractive index n colloid of a colloid solution of nanoparticles in several solvents with refractive indices n solvent of corresponding pure solvents and has an accuracy of ±2 × 10−4. Upconversion nanosize phosphors (UCNPs) are synthesized in the form of a β-NaYF4 crystalline matrix doped with Yb3+, Er3+, and Tm3+ rare earth ions. UCNPs have a doped core with a diameter of 40 ± 5 nm and undoped shell with a thickness of 3–5 nm. Synthesized nanocrystals possess intense photoluminescence in the blue, green, and red spectral ranges upon excitation by IR radiation with a wavelength of 977 nm. Using a spectroscopic refractometer, the dispersion of the refractive index of β-NaYF4/Yb3+/Er3+/Tm3+ nanocrystals was measured for the first time in the spectral range of 450–1000 nm with an accuracy of ±2 × 10−4.

Keywords

Refractive Index Colloid Solution Adamantane Dispersion Characteristic Decalin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  • V. I. Sokolov
    • 1
    Email author
  • A. V. Zvyagin
    • 1
  • S. M. Igumnov
    • 2
  • S. I. Molchanova
    • 1
  • M. M. Nazarov
    • 1
  • A. V. Nechaev
    • 3
  • A. G. Savelyev
    • 1
  • A. A. Tyutyunov
    • 2
  • E. V. Khaydukov
    • 1
  • V. Ya. Panchenko
    • 1
  1. 1.Institute on Laser and Information TechnologiesRussian Academy of SciencesShaturaRussia
  2. 2.Nesmeyanov Institute of Organoelement CompoundsRussian Academy of SciencesMoscowRussia
  3. 3.Lomonosov Moscow University of Fine Chemical TechnologyMoscowRussia

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