Tamara V Gavrilovic

Tamara V Gavrilovic
Vinča Institute of Nuclear Sciences | VIN · Department of Radiation Chemistry and Physics

dr chem

About

18
Publications
10,813
Reads
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373
Citations
Additional affiliations
November 2017 - November 2020
Institute of Solid State Physics, University of Latvia
Position
  • PhD Student
November 2017 - October 2021
Institute of Solid State Physics, University of Latvia
Position
  • Researcher
October 2012 - present
Vinča Institute of Nuclear Sciences
Position
  • Research Assistant

Publications

Publications (18)
Article
We demonstrate the thermal history forensic measurements founded on the emission intensity ratio of Eu³⁺-doped yttrium vanadate. An increase in phosphor’s crystallite size with annealing temperature is observed, causing a significant and permanent increase in the emission intensity and symmetry ratio (ratio of Eu3+ 5D0 → ⁷F1 and ⁵D0 → ⁷F2 emissions...
Article
Full-text available
The figures of merit of luminescence intensity ratio (LIR) thermometry for Er3+ in 40 different crystals and glasses have been calculated and compared. For calculations, the relevant data has been collected from the literature while the missing data were derived from available absorption and emission spectra. The calculated parameters include Judd–...
Preprint
Full-text available
The figures of merit of luminescence intensity ratio (LIR) thermometry for Er3+ in 40 different crystals and glasses have been calculated and compared. For calculations, the relevant data has been collected from the literature while the missing data were derived from available absorption and emission spectra. The calculated parameters include Judd-...
Article
YPO4 phosphors doped with trivalent ion Pr³⁺ were prepared by sol–gel method and treated with different doses of gamma radiation, from 0.25 MGy to 4 MGy. Effects of radiation on morphology, structure and luminescent properties were analyzed. Also, the influence of radiation on the change in the color of the samples was examined. The color efficienc...
Article
In recent years, there exists a tendency in research of up-conversion materials to shift excitation from 980 nm to shorter wavelengths. Here, in order to produce up-conversion luminescence emission of GdVO4-based materials under 808 nm excitation, polycrystalline powders of GdVO4:Er3+/Nd3+ and GdVO4:Ho3+/Nd3+ were successfully prepared by a high-te...
Article
Nanoparticles (5nm) and nanorods (2nm×15nm and 4nm×20nm) of monoclinic monazite LaPO4:Eu3+ were prepared by reverse micelle and co-precipitation techniques. Effects of the particle size and surface defects on the intensity of luminescence and the emission spectrum shapes were analyzed by high resolution spectroscopy under laser (266nm) and X-rays ex...
Chapter
Both novel and older widely and routinely used methods of chemical synthesis of new multi-functional inorganic (nano)materials with different sizes and morphologies are reviewed and summarized. Illustrative examples of micro– and nanoparticle preparations are provided with regard to different applications: renewable and sustainable energy harvestin...
Article
In this work, we focused on the syntheses, structure and spectroscopic properties of GdVO 4 :Dy 3þ and DyVO 4 (nano)particles of different sizes and shapes (spherical nanoparticles of 2 nm, 4 nm, and 20 nm in size, nanorods with a few nanometers in diameter and up to 10e20 nm in length and microparticles of 1 e8 mm) obtained by four synthetic metho...
Article
This paper provides the detailed study of (nano)particle’s size effect on structural and luminescent properties of LaPO4:Eu3+ synthesized by four different methods: high temperature solid-state, co-precipitation, reverse micelle and colloidal. These methods delivered monoclinic monazite-phase submicron particles (> 100 nm), 4 × 20 nm nanorods and 5...
Poster
Considerable efforts have been made to prepare up-converting nanoparticles (UCNPs) which absorb radiation in the near infrared region (NIR). Until recently, diode lasers at 980 nm have been commonly applied as optical pump sources in the NIR. However, these light sources show serious deficiencies in biomedical applications. Light penetration into a...
Article
Lanthanide-doped GdVO4 nanorods that exhibit upconversion emission under 982 nm excitation have been prepared by a facile room-temperature chemical co-precipitation method followed by a subsequent annealing at temperatures of 600 °C, 800 °C and 1000 °C. Multicolor upconversion emission, including white, was achieved by tuning the concentrations of...
Article
Full-text available
In this paper, we studied the effects of Er 3+ /Yb 3+ concentration ratio on structural, morphological and luminescence properties of GdVO 4 :Er 3+ /Yb 3+ green phosphors prepared by a high-temperature solid state method. The samples with different concentrations (between 0.5 to 2 mol%) of dopant Er 3+ emitting ions and different concentrations (be...
Article
We present the structural and luminescent properties of Ho3+/Yb3+-doped GdVO4 and Li+-co-doped GdVO4:Ho3+/Yb3+ powder phosphors. The materials were prepared by high-temperature solid state method with different concentrations (between 0.5 and 2 mol%) of dopant Ho3+ emitting ions and different concentrations (between 5 and 20 mol%) of sensitizer Yb3...
Article
Full-text available
Synthesis of Eu(3+)- and Er(3+)/Yb(3+)-doped GdVO4 nanoparticles in reverse micelles and their multifunctional luminescence properties are presented. Using cyclohexane, Triton X-100, and n-pentanol as the oil, surfactant, and co-surfactant, respectively, crystalline nanoparticles with ~4 nm diameter are prepared at low temperatures. The particle si...
Article
Full-text available
The aim of this work is to study up-conversion (UPC) luminescence in a series of Tm3+/Yb3+-co-doped GdVO4 samples synthesized by the solid-state method. The concentrations of Yb3+ ions were 3, 6 and 9 mol.%, while the concentration of Tm3+ ions was fixed (3mol.%). X-ray diffraction patterns for all the synthesized samples confirmed successful forma...

Questions

Question (1)
Question
trying to find a suitable liquid carrier substances that i can add to ferromagnetic so it does not stick to the glass under the influence of magnets (magnet is not so strong)

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Projects

Projects (2)
Project
Main scope: The proposed interdisciplinary project perceive the resolution of problems widely investigated in the field of luminescent up-converting nanomaterials, such as stabilization, modification, (bio)functionalization of the surface and toxicity of materials which will result in design and preparation of multifunctional nanomaterials with improved performance. Additionally, proposed structures might be employed as solid-state laser amplifiers, counterfeiting labels, as well as a contrast agent for multimodal imaging, cancer detection, photodynamic therapy and drug delivery.
Project
Development of novel and innovative routes for nanopowder synthesis and structural, morphological and optical characterization (up-conversion luminescence) of rare earth doped nanopowders