A numerical model was developed to study the time dynamics of photoluminescence emitted by Tb3+ doped multimode chalcogenide-selenide glass fibers pumped by laser light at approximately 2 μm. The model consists of a set of partial differential equations (PDEs), which describe the temporal and s...

Due to the interesting properties of Zn4Sb3 thermoelectric material, a reliable preparation method of this material is required. In this study, the formation of zinc antimonides by the combustion synthesis method is investigated and subjected to characterization using X-ray diffraction and Raman...

In this study, performance and stability of zinc antimonide thin film thermoelectric sample is analyzed under transient thermal conditions. The thermoelectric materials are deposited on glass based substrate where the heat flow is parallel with the thermoelectric element length. The specimen is ...

Zinc‑antimony binary system is an intermediate temperature thermoelectric material with great development prospects. In this work, Zn target and Sb target were jointed to form a composite target which was used for preparing zinc antimonide thin films by ion beam sputtering deposition method. Whe...

Yb-doped GaSb ingots have been grown by the Bridgman method. The defect structure and compositional homogeneity of the crystals have been investigated by cathodoluminescence and X-ray microanalysis in the scanning electron microscope. The nature of the point defects has been found to depend on t...

The laser micro-drilling of “thru” holes, also known as via holes, in Si, InP and InSb semiconductor wafers was studied using millisecond pulse lengths from an IPG Laser Model YLR-2000 CW multimode 2 kW Ytterbium Fibre Laser and a JK400 (400 W) fibre laser, both with 1070 nm wavelength. The fl...

The effect of indium icosahedral void-site filling on the transport properties of cobalt and rhodium antimonide solid solutions is investigated. Co4−xRhxSb12 and indium-filled In0.1Co4−xRhxSb12 solid solutions were synthesized. Partial rhodium substitution produces a distinct clustering-induced ...

The electronic structure of the ternary rare-earth chromium antimonides RECrSb3 (RE=La–Nd, Sm, Gd–Dy, Yb) has been examined by high-resolution X-ray photoelectron spectroscopy (XPS) for the first time. The RE 3d or 4d core-line spectra are substantially complicated by the presence of satellite...

CaS and SrS, in particular when doped with divalent europium and/or trivalent cerium, have been extensively studied as phosphor materials. In contrast, surprisingly little is known on the behavior of divalent Yb in both hosts. Therefore we report on the luminescence of divalent ytterbium in calc...

Bimetallic Pd-Y nanoparticles were synthesized by yttrium precursor reduction on the surface of colloidal Pd seeds catalyzed by palladium hydride. The addition of yttrium improved the thermal stability of the Pd nanoparticles to agglomeration. The nanoparticles before and/or after deposition on ...

The reaction of sodium bromide (NaBr), yttrium (Y), sulfur (S) and silicon disulfide (SiS2) in the molar ratio 1:4:6:2 with an excess of NaBr as flux in evacuated silica ampoules at 850°C for 7 days leads to the formation of deep red, hexagonal pillar-shaped single crystals of the title compoun...

This work is focused on the recovery of yttrium and zinc from fluorescent powder of cathode ray tube (CRT). Metals are extracted by sulphuric acid in the presence of hydrogen peroxide. Leaching tests are carried out according to a 22 full factorial plan and the highest extraction yields for yttr...

The synthesis of NaYF4 compounds via the “soft chemistry” of sulfide precursors (a simple Y2S3 and a complex NaYS2) was performed. Hydrofluoric acid solution (HF) at a concentration of 3–45% and different contents of a saturated aqueous solution of sodium fluoride that was acidified by hydrof...

Present work deals with the effect of Yttrium (Y) doping on the structural and optical properties of Zinc Sulfide (ZnS) nanoparticles synthesized by chemical co-precipitation method. The incorporation of Y in ZnS structure and the resulting elemental composition were confirmed using EDAX analysi...

New phosphine-based bidentate ligands, 2-Me-8-Ph2P(X)C9H8NH (3, X = O; 4, X = S) and N-R-2-Ph2P(X)C6H4NH (5, R = Et, X = O; 6, R = Me, X = S; 7, R = Et, X = S) were prepared via ortho-lithiation of 1,2,3,4-tetrahydroquinaldine (2-Me-C9H9NH) and aniline derivatives (N-R-C6H5NH). Reaction of the o...

Three ternary rare-earth zirconium sulfides, Y2ZrS5 (1), Ce2ZrS5 (2) and Pr2ZrS5 (3), have been synthesized by high-temperature solid-state reactions. They crystallize in the space group Pnma of the orthorhombic system, belonging to the Y2HfS5 structure type. There are two types of building unit...

Highly porous cerium oxide modified Zr(OH)4 samples were synthesized using a simple one stage urea precipitation method. The amorphicity level of zirconium hydroxide did not change upon addition of cerium oxide particles. A unique aspect of the cerium oxide-modified materials is the presence of ...

Uranium is used in many chemical forms in civilian and military industries and is a known nephrotoxicant. A key issue in monitoring occupational exposure is to be able to evaluate the potential damage to the body, particularly the kidney. In this study we used innovative proteomic techniques to ...

Acidithiobacillus ferrooxidans is an acidophile that thrives in metal-contaminated environments and tolerates high levels of uranium. To gain a better understanding of the processes involved in U(VI) resistance, comparative proteomics was used. The proteome of A. ferrooxidans was grown in the pr...

Contents of uranium in coals from Odeř in the northernmost part of the Sokolov Basin, Czech Republic, in the vicinity of the well known St. Joachimsthal uranium ore deposits, reach extremely high values. In the present work, coal samples with contents of uranium ranging from 0.02 to 6 wt.% were ...