Pr-doped YPO nanocrystal embedded into an optical fiber.

Optical fiber with YPO:Pr nanocrystals (NCs) is presented for the first time using the glass powder-NCs doping method. The method's advantage is separate preparation of NCs and glass to preserve luminescent and optical properties of NCs once they are incorporated into optical fiber. The YPO:Pr nanocrystals were synthesized by the co-precipitation and hydrothermal methods, optimized for size (< 100 nm), shape, Pr ions concentration (0.

Broadband Profiled Eye-Safe Emission of LMA Silica Fiber Doped with Tm/Ho Ions.

LMA (Large Mode Area) optical fibers are presently under active investigation to explore their potential for generating laser action or broadband emission directly within the optical fiber structure. Additionally, a wide mode profile significantly reduces the power distribution density in the fiber cross-section, minimizing the power density, photodegradation, or thermal damage. Multi-stage deposition in the MCVD-CDT system was used to obtain the structural doping profile of the LMA fiber multi-ring core doped with Tm and Tm/Ho layer profiles.

Broadband 1.5-2.1 µm emission in gallo-germanate dual-core optical fiber co-doped with Er and Yb/Tm/Ho.

The near-infrared emission in fabricated low-phonon energy, gallo-germanate glass, and double-core optical fiber has been investigated. Broadband amplified spontaneous emission (ASE) was obtained in optical fiber with cores doped with: 1 - 0.2ErO and 2 - 0.

Tm/Ho profiled co-doped core area optical fiber for emission in the range of 1.6-2.1 µm.

Double-clad optical fiber with a multi-ring core profile doped with thulium and holmium fabricated by Modified Chemical Vapor Deposition Chelate Doping Technology (MCVD-CDT) is presented. The measured TmO and HoO complexes' weight concentrations were 0.5% and 0.

Analysis of Excitation Energy Transfer in LaPO Nanophosphors Co-Doped with Eu/Nd and Eu/Nd/Yb Ions.

Nanophosphors are widely used, especially in biological applications in the first and second biological windows. Currently, nanophosphors doped with lanthanide ions (Ln) are attracting much attention. However, doping the matrix with lanthanide ions is associated with a narrow luminescence bandwidth.

Tellurite Glasses from the 70TeO-5XO-10PO-10ZnO-5PbF(X= Pb, Bi, Ti) System Doped Erbium Ions-The Influence of Erbium on the Structure and Physical Properties.

In this article, we present research on the influence of erbium ions on the structure and magneto-optical properties of 70TeO-5XO-10PO-10ZnO-5PbF (X = Pb, Bi, Ti) tellurite glass systems. Structural changes occurring in the glasses during doping with erbium ions were investigated using positron annihilation lifetime spectroscopy (PALS) and Raman spectroscopy. The X-ray diffraction (XRD) method was used to confirm the amorphous structure of the investigated samples.

Correction: Highly efficient green up-conversion emission from fluoroindate glass nanoparticles functionalized with a biocompatible polymer.

[This corrects the article DOI: 10.1039/D2RA03171J.].

The Effect of Fluorides (BaF, MgF, AlF) on Structural and Luminescent Properties of Er-Doped Gallo-Germanate Glass.

The effect of BaF, MgF, and AlF on the structural and luminescent properties of gallo-germanate glass (BGG) doped with erbium ions was investigated. A detailed analysis of infrared and Raman spectra shows that the local environment of erbium ions in the glass was influenced mainly by [GeO] and [GeO] units. Moreover, the highest number of non-bridging oxygens was found in the network of the BGG glass modified by MgF.

Highly efficient green up-conversion emission from fluoroindate glass nanoparticles functionalized with a biocompatible polymer.

Up-conversion nanoparticles have garnered lots of attention due to their ability to transform low energy light (near-infrared) into high-energy (visible) light, enabling their potential use as remote visible light nano-transducers. However, their low efficiency restricts their full potential. To overcome this disadvantage, fluoroindate glasses (InF) doped at different molar concentrations of Yb and Er were obtained using the melting-quenching technique, reaching the highest green emission at 1.

TEMPO-oxidized cellulose for in situ synthesis of Pt nanoparticles. Study of catalytic and antimicrobial properties.

In this work, platinum nanoparticles (PtNPs) were synthesized by a modified polyol process using TEMPO-oxidized nanocellulose (TOCN) as a stabilizing and co-reducing agent. Different ratios of TOCN nanocellulose to Pt ions were studied to establish the optimum stabilizing effect of PtNPs. The effect of different pH of aqueous TOCN suspensions on the morphology of PtNPs was also examined.

Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions.

Glass-ceramic is semi-novel material with many applications, but it is still problematic in obtaining fibers. This paper aims to develop a new glass-ceramic material that is a compromise between crystallization, thermal stability, and optical properties required for optical fiber technology. This compromise is made possible by an alternative method with a controlled crystallization process and a suitable choice of the chemical composition of the core material.

Investigation of the TeO/GeO Ratio on the Spectroscopic Properties of Eu-Doped Oxide Glasses for Optical Fiber Application.

This study presented an analysis of the TeO/GeO molar ratio in an oxide glass system. A family of melt-quenched glasses with the range of 0-35 mol% of GeO has been characterized by using DSC, Raman, MIR, refractive index, PLE, PL spectra, and time-resolved spectral measurements. The increase in the content of germanium oxide caused an increase in the transition temperature but a decrease in the refractive index.

The Utilisation of Solid Fuels Derived from Waste Pistachio Shells in Direct Carbon Solid Oxide Fuel Cells.

The comprehensive results regarding the physicochemical properties of carbonaceous materials that are obtained from pistachio shells support their usage as solid fuels to supply direct carbon solid oxide fuel cells (DC-SOFCs). The influence of preparation conditions on variations in the chemical composition, morphology of the biochar powders, and degree of graphitization of carbonaceous materials were investigated. Based on structural investigations (X-ray diffraction analysis and Raman spectroscopy), it was observed that disordered carbon particles developed during the application of thermal treatments.

Structure and Luminescence Properties of Transparent Germanate Glass-Ceramics Co-Doped with Ni/Er for Near-Infrared Optical Fiber Application.

An investigation of the structural and luminescent properties of the transparent germanate glass-ceramics co-doped with Ni/Er for near-infrared optical fiber applications was presented. Modification of germanate glasses with 10-20 ZnO (mol.%) was focused to propose the additional heat treatment process controlled at 650 °C to obtain transparent glass-ceramics.

Dehydroxylation of Perlite and Vermiculite: Impact on Improving the Knock-Out Properties of Moulding and Core Sand with an Inorganic Binder.

The article presents the results of research aimed at examining the type of swelling material introduced into moulding or core sand to improve their knock-out properties. Tests on Slovak perlite ore (three grain sizes), Hungarian perlite ore and ground vermiculite (South Africa) were carried out. For this purpose, thermal and structural analyses (FTIR-Fourier Transform Infrared Spectroscopy), a chemical composition test (XRF-X-Ray Fluorescence), phase analysis (XRD-X-Ray Diffraction), and scanning electron microscopy (SEM-Scanning Electron Microscope) as well as final strength tests of moulding sands with the addition of perlite ore and vermiculite were carried out.

Application of Statistical Methods in Predicting the Properties of Glass-Ceramic Materials Obtained from Inorganic Solid Waste.

This paper uses mathematical methods as the basic tool at the stage of experiment planning. The importance of research programming applications was shown using the theory of experiments and the STATISTICA software. The method of experiment planning used in the case of studying the properties of a mixture, depending on its composition, features considerable complexity.

Fluoroindate Glass Co-Doped with Yb/Ho as a 2.85 μm Luminescent Source for MID-IR Sensing.

This work reports on the fabrication and analysis of near-infrared and mid-infrared luminescence spectra and their decays in fluoroindate glasses co-doped with Yb/Ho. The attention has been paid to the analysis of the Yb→ Ho energy transfer processed ions in fluoroindate glasses pumped by 976 nm laser diode. The most effective sensitization for 2 μm luminescence has been obtained in glass co-doped with 0.

Luminescence Sensing Method for Degradation Analysis of Bioactive Glass Fibers.

The effects of Sm content on the optical properties and bioactivity of 13-93 bioactive glass were presented. Sm doped glass fibers drawn from bioactive glass were analyzed in simulated body fluid (SBF) for the determination of ion release. Optical analysis of the Sm ions in bioactive glass fibers was used for degradation monitoring.

Synthesis and Influence of 3-Amino Benzoxaboroles Structure on Their Activity against .

Benzoxaboroles emerged recently as molecules of high medicinal potential with Kerydin (Tavaborole) and Eucrisa (Crisaborole) currently in clinical practice as antifungal and anti-inflammatory drugs, respectively. Over a dozen of 3-amino benzoxaboroles, including Tavaborole's derivatives, have been synthetized and characterized in terms of their activity against as a model pathogenic fungus. The studied compounds broaden considerably the structural diversity of reported benzoxaboroles, enabling determination of the influence of the introduction of a heterocyclic amine, a fluorine substituent as well as the formyl group on antifungal activity of those compounds.

Fluoroindate glasses co-doped with Pr/Er for near-infrared luminescence applications.

Fluoroindate glasses co-doped with Pr/Er ions were synthesized and their near-infrared luminescence properties have been examined under selective excitation wavelengths. For the Pr/Er co-doped glass samples several radiative and nonradiative relaxation channels and their mechanisms are proposed under direct excitation of Pr and/or Er. The energy transfer processes between Pr and Er ions in fluoroindate glasses were identified.

Luminescent Studies on Germanate Glasses Doped with Europium Ions for Photonic Applications.

Glass and ceramic materials doped with rare earth (RE) ions have gained wide interest in photonics as active materials for lasers, optical amplifiers, and luminescent sensors. The emission properties of RE-doped glasses depend on their chemical composition, but they can also be tailored by modifying the surrounding active ions. Typically, this is achieved through heat treatment (including continuous-wave and pulsed lasers) after establishing the ordering mechanisms in the particular glass-RE system.

Crystallization Kinetics and Structural Properties of the 45S5 Bioactive Glass and Glass-Ceramic Fiber Doped with Eu.

An investigation of the crystallization kinetics of 45S5 Bioglass using differential scanning calorimetry is presented in this paper. Thermal analysis was performed using the Friedman method. The activation energy and the Avrami index were calculated.

Synthesis and characterization of poly(methyl methacrylate) co-doped with Tb(tmhd) - Rhodamine B for luminescent optical fiber applications.

Currently, there is a growing interest in the development of multi-colored materials based on the combination of two or more systems (organic or inorganic) as a strategy to take advantage of their combined physical or chemical properties. These multi-colored materials have found potential applications as sensors, amplifiers, and optical fibers. In this work, the physical characteristics of poly(methyl methacrylate) (PMMA) doped with Terbium(III)-tris-(2,2,6,6-tetramethyl-3,5-heptanedionate) (Tb(tmhd)) at 1.

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF Nanocrystals.

The ErF-doped oxyfluoride phospho-tellurite glasses in the (40-x) TeO-10PO-45 (BaF-ZnF) -5NaO-xErF system (where x = 0.25, 0.50, 0.

Component-resolved diagnosis (CRD) of food anaphylaxis.

Anaphylaxis is an increasing problem in public health. The food allergens (mainly milk, eggs, and peanuts) are the most frequent cause of anaphylaxis in children and youth. In order to define the cause of anaphylaxis, skin tests, the determination of the concentration of specific IgE in the blood and basophil activation test are conducted.