A5080989938- Luminescence Properties of Advanced Materials
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Glass properties and applications
- Magnetic Properties and Synthesis of Ferrites
- Multiferroics and related materials
- Iron oxide chemistry and applications
- Magnetic and transport properties of perovskites and related materials
- Ferroelectric and Piezoelectric Materials
- Advanced Condensed Matter Physics
- ZnO doping and properties
- Magnetic Properties of Alloys
- Cultural Heritage Materials Analysis
- Mineralogy and Gemology Studies
- Magnetic properties of thin films
- Conducting polymers and applications
- Gas Sensing Nanomaterials and Sensors
- Thermal and Kinetic Analysis
- Copper-based nanomaterials and applications
- Inorganic Fluorides and Related Compounds
- Carbon and Quantum Dots Applications
- Transition Metal Oxide Nanomaterials
- Pigment Synthesis and Properties
- Magneto-Optical Properties and Applications
- Advanced Sensor and Energy Harvesting Materials
National Institute of Materials Physics
2016-2025
University of Bucharest
2022
Czech Academy of Sciences, Institute of Physics of Materials
2015
West University of Timişoara
2015
Abstract When used as the active layers—either a light absorber in photovoltaic devices or an electroluminescent material light‐emitting devices—lead‐free perovskites significantly impact performance of optoelectronic devices. This study focuses on antimony‐based perovskites, which are promising for lighting applications. These types enable formation self‐trapped excitons (STEs) with higher dissociation energy than lead‐based generate lower energy. The (CH 3 NH ) Sb 2 I 9 crystals...
This study explored a new green approach of the wet ferritization method to obtain magnetic cobalt ferrite (CoFe2O4) by using eucalyptus leaves aqueous extract as reducing/chelating/capping agent. The spinel single cubic phases prepared samples were proved powder X-ray diffraction (XRD), Fourier-Transform Infrared (FTIR) and Raman spectroscopy. average crystallite size is in range between 3 20 nm. presence functional groups coating obtained material confirmed from FTIR thermal analysis....
Abstract The Ni49+xMn32-2xGa19+x (x = 0; 2) Heusler ferromagnetic shape memory alloys were prepared using spark plasma sintering raw flake-type powders obtained by soft grinding melt-spun ribbons. Samples characterized X-ray diffraction, electron microscopy, thermal analysis, and bending tests. Although the properties of ribbons corresponding show similar properties' tendencies, they are opposite in bulk sintered when compared with precursor powders. Namely, Ni49Mn32Ga19 shows a higher...
Polycrystalline In2S3 thin films have been grown on SnO2/glass substrates by chemical bath deposition technique and irradiated at different high gamma doses 3, 7, 15 40 kGy. X-ray diffraction, Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS), Spectrophotometer, Photoluminescence Thermoluminescence were used to investigate physical properties of induced irradiation. After being irradiated, structural shown that preferred orientation has moved from (4 0 0) plan 2θ1 =...
Rare-earth doped GdF3 nanocrystals embedded in silica glassy matrix have been prepared by controlled crystallization of the xerogel; influence rare-earth ion (Pr, Sm, Eu, Tb, Dy, Er, Yb) and additional Li-codopant on structural optical properties was discussed. The precipitation RE-doped nanocrystalline phase is result Gd-trifluoracetate thermolysis revealed as a strong exothermic peak at around 300 °C. Structural analysis SiO2-GdF3 glass-ceramic sample calcined 525 °C showed occurrence...
Ferrofluid samples consisting of magnetite nanoparticles (NPs) coated with oleic acid and dispersed in a non-polar organic solvent have been synthesized by chemical routes. Different volume fractions, ϕ, magnetic NPs were considered. The overall structural characterization has performed x-ray diffractometry, lattice parameters average coherence lengths evaluated via Rietveld refinements. properties different analysed SQUID magnetometry temperature-dependent M¨ ossbauer spectroscopy finally...
This work investigates the structural, magnetic and magneto-optical properties of a new zinc phosphate-tellurite glass belonging to 45ZnO-10Al2O3-40P2O5-5TeO2 system. The was prepared by wet method processing starting reagents followed suitable melting–stirring–quenching–annealing steps. Specific parameters such as density, average molecular mass, molar volume, oxygen packaging refractive index, refractivity, electronic polarizability, reflection loss, optical transmission, band gap basicity...
In this work, new films containing composite materials based on blends of thermoplastic polymers the polyurethane (TPU) and polyolefin (TPO) type, in absence presence BaTiO3 nanoparticles (NPs) with size smaller 100 nm, were prepared. The vibrational properties free depending weight ratio two studied. Our results demonstrate that these are optically active, strong, broad, adjustable photoluminescence by varying amount TPU. crystalline structure influence crystallization process inorganic NPs...
The incorporation of therapeutic-capable ions into bioactive glasses (BGs), either based on silica (SBGs) or phosphate (PBGs), is currently envisaged as a proficient path for facilitating bone regeneration. In conjunction with this view, the single and complementary structural bio-functional roles CuO Ga2O3 (in 2–5 mol% range) were assessed, by deriving series SBG PBG formulations starting from parent glass systems, FastOs®BG – 38.5SiO2—36.1CaO—5.6P2O5—19.2MgO—0.6CaF2,...
A quantitative treatment of the effects magnetic mutual interactions on specific absorption rate a superparamagnetic system iron oxide nanoparticles coated with oleic acid is reported. The nanoparticle concentration considered ferrofluid samples varied from very low (0.005) to medium (0.16) value volume fraction, whereas amplitude exciting AC field ranged 14–35 kA m−1. It was proved that direct effect interparticle resides in regime modified superparamagnetism, dealing, besides usual...
The crystallization mechanism of sol–gel-derived NaYF<sub>4</sub>:(Yb,Er) up-converting phosphors has been studied by differential scanning calorimetry analysis using both model-free and model fitting approaches.