Milica Sekulic

Milica Sekulic
Vinča Institute of Nuclear Sciences | VIN · Department of Radiation Chemistry and Physics

Master of Engineering

About

23
Publications
3,456
Reads
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298
Citations
Introduction
Milica Sekulic currently works at the Department of Radiation Chemistry and Physics, Vinča Institute of Nuclear Sciences. Milica does research in Spectroscopy and Nanotechnology. Their most recent publication is 'Gamma-radiation effects on luminescence properties of Eu3+ activated LaPO4 phosphor'.

Publications

Publications (23)
Article
Full-text available
Lanthanide ions possess various emission channels in the near-infrared region that are well known in bulk crystals but are far less studied in samples with nanometric size. In this work, we present the infrared spectroscopic characterization of various Nd-doped fluoride and sesquioxide nanocrystals, namely Nd:Y2O3, Nd:Lu2O3, Nd:Sc2O3, Nd:YF3, and N...
Article
Full-text available
In this study, silicate nanofillers; dicalcium silicate, magnesium silicate, tricalcium silicate, and wollastonite; were synthesized using four different methods and incorporated into the epoxy resin to improve its mechanical properties. Characterization of the newly synthesized nanofillers was performed using Fourier-transformation infrared (FTIR)...
Article
Full-text available
Eu3+-doped YxLu1−xNbO4 (x = 0, 0.25, 0.5, 0.75, 1) were prepared by the solid-state reaction method. YNbO4:Eu3+ and LuNbO4:Eu3+ crystallize as beta-Fergusonite (SG no. 15) in 1–10 μm diameter particles. Photoluminescence emission spectra show a slight linear variation of emission energies and intensities with the solid-solution composition in terms...
Article
Upconversion sub-micron particles are one of the most perspective materials due to their wide application range, the most important being in the bio-medicinal field where they can be used for labeling, sensing, treatment or drug delivery. Chemically stable upconversion sub-micron particles of La2O2S co-doped with Yb³⁺/Ho³⁺ and Yb³⁺/Tm³⁺ were synthe...
Article
Nanoparticles of less than 100 nm of La2O2S co-doped with Er³⁺ and Yb³⁺ in 2% and 12% concentrations, respectively, were synthesized by the improved furnace combustion technique that limits the precursor usage and without the hazardous chemicals. The lanthanum oxysulfide was identified in hexagonal crystal phase. Under 980 nm excitation the sample...
Article
The multiparametric luminescence thermometry with Dy³⁺, Cr³⁺ double activated yttrium aluminium garnet – YAG is demonstrated. Phospors were synthesized via Pechini method and their structure is confirmed by X-ray diffraction analysis. Mean crystallite size of powders was calculated to be ~22 nm. Morphology was investigated using scanning electron m...
Article
In this study, halloysite nanotubes (HNT) were modified by: 3‐glycidyloxypropyltrimethoxysilane (GLYMO), 3‐aminopropyltrimethoxysilane (APTES), and 2,2‐Bis[4‐(glycidyloxy) phenyl] propane (DGEBA), and incorporated in the epoxy resin matrix to enhance its mechanical properties. The HNT/epoxy nanocomposite materials were prepared by mixing different...
Article
Cr ³⁺ -doped Mg 2 SiO 4 orthorhombic nanoparticles are synthesized by a combustion method. The 3d ³ electron configuration of the Cr ³⁺ ion results in the deep-red emission from optical transitions between d–d orbitals. Two overlapping emissions from the Cr ³⁺ spin-forbidden ² E g → ⁴ A 2g and the spin-allowed ⁴ T 2g → ⁴ A 2g electronic transitions...
Chapter
Halloysite nanotubes (HNTs), naturally occurring as aluminosilicate nanoclay mineral, have recently emerged as a possible nanomaterial for countless applications due to their specific chemical structure, tubular shape, high aspect ratio, biocompatibility and low toxicity. In this study, HNTs were incorporated into the epoxy resin matrix to improve...
Poster
Full-text available
Halloysite nanotubes (HNTs), naturally occurring as aluminosilicate nanoclay mineral, have recently emerged as a possible nanomaterial for countless applications due to their specific chemical structure, tubular shape, high aspect ratio, biocompatibility and low toxicity. In this study, HNTs were incorporated into the epoxy resin matrix to improve...
Article
Full-text available
The paper presents static and dynamic tests of carbon/epoxy composite materials with fiber orientation at 0°/90° and ±45°. The main tensile properties were determined as a basis for subsequent dynamic tests, in which permanent dynamic strength, crack growth, and crack growth rate in the material due to the action of fatigue load were assessed. Comp...
Article
The antibacterial ability of in situ prepared nanometer-sized silver particles, immobilized in agar-agar films, was studied as a function of the concentration of co-dopant, magnesium ions. Content of inorganic components in hybrid films was determined using inductively coupled plasma optic emission spectroscopy, and found to be low (<2 wt.-%). Morp...
Article
In this work, the potential of Li1.8Na0.2TiO3:Mn4+ for the lifetime-based luminescence thermometry is assessed. The material is prepared by the solid-state reaction of Li2CO3, Na2CO3, and nanostructured TiO2 at 800 °C, and its monoclinic structure (space group C2/c) is confirmed by X-ray diffraction analysis. In this host, Mn4+ provides strong abso...
Article
Defect-fluorite structured Eu ³⁺ -doped Y 2 Sn 2 O 7 nanoparticles (30–40 nm) were successfully prepared through a facile co-precipitation method without any organic additives or templates followed by calcination in air. Luminescent properties of the as-prepared Y 2-x Eu x Sn 2 O 7 (0.02 ≤ x ≤ 0.6) nanophosphors were fully characterized from an exp...
Article
(Y1-xLnx)2O3 oxides (Ln = Y, Gd, Lu) doped with Eu3+ ions are widely used as commercialized scintillators in medical and industrial scanning applications, with high performance and attractive properties. In this work, effects of high-energy radiation on luminescence properties of (Y1-xGdx)2O3: Eu3+ powders with different particle sizes in the nanom...
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 this paper we will be presenting JOES (Judd-Ofelt from Emission Spectra), an application software for calculation of the Judd-Ofelt intensity parameters and derived quantities from the emission spectra of Eu³⁺ doped materials. The program is written to be user friendly and it requires no previous experience in the field of study. This Free and O...
Poster
Eu3+ activated (Y1-xLnx)2O3 (Ln=Y, Gd, Lu) phosphors are widely used as commercialized scintillators in medical and industrial scanning applications, with high performance and attractive properties. In this work, effects of high-energy radiation on luminescence properties of (Y1-xGdx)2O3:Eu3+ powders with different particle sizes in the nanometric...
Article
The binary luminescence thermometry probe is prepared from Y2O3:Ho3+ and Mg2TiO4:Mn4+ powders. This probe facilitates self‐referencing temperature readouts with excellent repeatability from both emission intensity ratio and excited state lifetimes. The ratio of intensities of Mn4+ deep red emission from 2E, 4T2→4A2 electronic transitions, and Ho3+...
Article
Full-text available
Eu3+ doped Mg2TiO4 (2 at% of Eu) nanoparticles which are 5 to 10 nm in diameter are prepared by Pechini-type polymerized complex route followed with the calcination in the temperature range from 400°C to 700°C. Emission spectra display characteristic 5D0-7FJ (J= 0, 1, 2, 3, and 4) spin forbidden f-f electronic transitions of the Eu3+ ions with the...
Article
Full-text available
Eu3+ doped Lu2Ti2O7 particles of 6 to 10 nm in diameter are prepared by Pechini-type polymerized complex route based on polyesterification between citric acid (CA) and ethylene glycol. X-ray diffraction measurements confirmed that Eu3+ doped Lu2Ti2O7 powders crystallized in the face-centered cubic lattice (Fd3m). Emission spectra displayed characte...

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Project (1)
Project
Sensitive detection of temperature using changes in optical emission from nanomaterials