Stanislav Slang

University of Pardubice · Center of Materials and Nanotechnologies

Synergistic interplays involving multiple active centers originating from TiO2 nanotube layers (TNT) and ruthenium (Ru) species comprising of both single atoms (SAs) and nanoparticles (NPs) augment the alkaline hydrogen evolution reaction (HER) by enhancing Volmer kinetics from rapid water dissociation and improving Tafel kinetics from efficient H*...

Radio frequency magnetron co-sputtering method employing GeTe and Sc targets was exploited for the deposition of Sc doped GeTe thin films. Different characterization techniques (scanning electron microscopy with energy-dispersive X-ray analysis, X-ray diffraction, atomic force microscopy, sheet resistance temperature-dependent measurements, variabl...

The influence of rapid thermal annealing (RTA) onto chalcogenide Ge-Sb-Se thin films is reported, focusing on changes in optical properties. These materials possess broad mid-infrared transparency covering the most critical absorption bands for (bio)chemical sensing and high third-order optical nonlinearities for potential applications in nonlinear...

Free to download link - https://authors.elsevier.com/a/1k2-T3IPaInsmd The present study investigates the glass-forming ability (GFA), structural, thermal, and optical properties of the TeO–BaO–BiO (TeBaBi) glass system, focusing on the mutual substitution trends of its constituent compounds. Prepared glasses were synthesized by the melt-quenching m...

The knowledge of viscosity behavior, crystal growth phenomenon, and diffusion is important in producing, processing, and practical applications of amorphous solids prepared in different forms (bulk glasses and thin films). This work uses microscopy to study volume crystal growth in Ge25Se75 bulk glasses and thermally evaporated thin films. The coll...

Within this study, the influence of particles of different types, natures, and sizes on the mechanical and corrosion resistance of pigmented systems containing spherical zinc was studied. For this study, prominent representatives from the group of transition metal dichalcogenides (MoS2, WS2), layered transition metal oxides (MoO3, WO3), and other s...

A systematic study of the doping ability of the TeO2−ZnO−BaO glassy system with Er3+ ions is presented to achieve strong Stokes/upconversion photoluminescence emission and to determine the optimal experimental conditions for conducting Judd-Ofelt analysis in Er-doped materials. Selected glassy samples across the TeO2−ZnO−BaO glass-forming region fo...

Present study investigates the glass-forming ability (GFA), structural, thermal, and optical properties of the TeO2−BaO−Bi2O3 (TeBaBi) glass system, focusing on the mutual substitution trends of its constituent compounds. Prepared glasses were synthesized by the melt-quenching method at 900 °C and the GFA was extended by chemical compositions with...

Thin films with compositions equally distributed through GaSb–GaTe and GaSb–Te tie-lines were fabricated by radio-frequency magnetron co-sputtering. Several characterization techniques (scanning electron microscopy with energy-dispersive X-ray analysis, temperature dependent grazing incidence X-ray diffraction, Raman scattering spectroscopy, variab...

The key parameters of semiconductor quantum dots (QDs) that determine the suitability and efficiency for the design of most optoelectronic devices are the spectral positions of absorbance (ABS) and photoluminescence (PL) maxima, Stokes shift, photoluminescence quantum yield (PL QY) and photoluminescence lifetime (PL LT). All these parameters have b...

Observation of conductive filaments has greatly aided the development of theoretical models of memristive devices. In this work, we visualized and reconstructed the conductive filaments in a Cu/Cu-doped SiO2/W device...

In this paper, we report on the infrared luminescence of amorphous praseodymium-doped Ge20In5Sb10Se65 waveguides, which can be used as infrared sources in photonic integrated circuits on silicon substrates. Amorphous chalcogenide thin films were deposited by radiofrequency magnetron cosputtering using an argon plasma whose deposition parameters wer...

This work presents the prospect of As–S–Se and As–Se thin film preparation from a modified solution of As50Se50 chalcogenide glass in ethylenediamine. The source solution was modified by direct dissolution of elemental sulfur and amorphous elemental selenium. Using this method, we successfully prepared four sulfur-modified (As45S10Se45, As40S20Se40...

Amorphous As33S67 thin films were prepared by spin-coating method from n-butylamine based glass solution as well as by thermal evaporation. Thin films were doped by silver ions from a solution of silver nitrate in dimethylsulfoxide. The influence of illumination on the photodoping kinetics was studied in dependence on the deposition technique and t...

We report on the substantial influence of methanol presence on the dissolution mechanism of Ge20Sb5S75 bulk glass with subsequent superior properties of thin films deposited from such solutions. Raman spectroscopy confirmed significant differences in structural features present in glass solutions prepared from pure amines (npropylamine and n-butyla...

Citation: Kohl, M.; Alafid, F.; Boštíková, K.; Krejčová, A.; Slang, S.; Rezníček, D.; Hrdina, R.; Kalendová, A. Preparation and Testing of Anti-Corrosion Properties of New Pigments Containing Structural Units of Melamine and Magnesium Cations (Mg 2+). Coatings 2023, 13, 1968. Abstract: This paper deals with the properties and testing of newly prepa...

Solution processed non-toxic Ge20Sb5Se75 chalcogenide glass thin films were deposited using spin-coating method from n-propylamine—methanol solvent mixture in specular optical quality. Optical properties, composition, structure, and chemical resistance were studied in dependence on the annealing temperature. Significant increase of refractive index...

This work addresses the possibilities of using synthesized novel magnesium complex dyes in zinc pigmented organic coatings based on epoxyester resin to reduce the zinc content in these coatings while maintaining or increasing the anticorrosive efficiency of them. The magnesium complexes Mg-Dye-I (C34H26MgN8O6), Mg-Dye-II (C26H19MgN3O5), Mg-Dye-III...

Well-organized, spherical, mesoporous hollow @CuMgAl-LDHs (layered double hydroxides) are prepared by the controlled removal of the SiO2 from SiO2@CuMgAl-LDH core-shell hybrids that in turn are synthesized via a bottom-up strategy. The materials are prepared with various Cu/Mg molar ratios (Cu/Mg = 0.05-0.50) while keeping the ratio of Cu and Mg co...

This work presents the possibility of AsS -Se chalcogenide glass thin film preparation from a solution of commercially available As 40 S 60 glass by modification of the solution composition with elemental selenium. We studied the dissolution of elemental selenium in n-butylamine and ethylenediamine based chalcogenide glass solutions. Samples of fou...

We present comparison of spin-coated thin films prepared in traditional way from solution of dissolved bulk glass of particular ternary composition with films prepared from mixture of two separately dissolved binary bulk glasses targeting the same composition. The samples of five tie-line As-S-Se compositions ranging from As33S67 to As33Se67 were d...

2D oxide materials have gained tremendous attention in the applications. Herein, a synthesis route of 2D WO3 materials via magnetron sputtering is reported. A deposition between 2D monolayers and thin film structure are accomplished according to the temperature of substrate. And 2D monolayers are only formed on a cooled substrate. Ag doping helps t...

This article deals with the simple preparation of environmentally friendly acrylic latex binders, which are functionalized with nanoparticles of metal oxides, namely MgO, ZnO, La2O3 and combinations of MgO and ZnO, serving as functional components to achieve antimicrobial properties, but also to improve physical–mechanical properties and chemical r...

The single-phase Ho³⁺-doped Yb3Ga5O12 garnet nanocrystals were synthesized by the sol-gel combustion technique using citric acid. Their structure, morphology and chemical composition were examined by the powder X-ray diffraction, attenuated total reflectance-Fourier transform infrared spectroscopy and Energy-dispersive X-ray spectrometry with the s...

Proper respiratory tract protection is the key factor to limiting the rate of COVID-19 spread and providing a safe environment for health care workers. Traditional N95 (FFP2) respirators are not easy to regenerate and thus create certain financial and ecological burdens; moreover, their quality may vary significantly. A solution that would overcome...

A tunable approach for the non-phosphine synthesis of monodisperse, highly photoluminescent ZnSexS1-x and Mn-doped ZnSe0.1S0.9 quantum dots (QDs) using (Z)-1-(octadec-9-enyl)-3-phenylselenourea and (Z)-1-(octadec-9-enyl)-3-phenylthiourea as novel sources of selenium and sulphur is provided. QDs syntheses were performed in an organic disperse medium...

The extremely high melting point of Mo, W and their sulfides acts as a barrier to the synthesis of chalcogenide glasses modified with these transition metal elements. Here, we demonstrate the preparation of amorphous thin films along the pseudobinary As40S60- MoS3tie-line by spin-coating. Using 0.02 M stock solutions, the limiting As40S60: MoS3mola...

Fulltext can be downloaded for free using: https://authors.elsevier.com/a/1eZNZ54fBDeYS --- We report the thorough study on glass forming ability and properties of the TeO2 - ZnO-BaO (TZB) optical glasses prepared by the melt-quenching method at 900 °C. The attention has been paid to investigation of thermal, structural, and optical properties of g...

The nanocrystalline single‐phase Er³⁺‐doped Yb3Ga5O12 garnets have been prepared by the sol‐gel combustion technique with a crystallite size of ≈30 nm. The presence of Yb³⁺ in garnet hosts allows their efficient excitation at the ≈977 nm wavelength. The Er³⁺ doping of Yb3Ga5O12 garnet host results in deep red Er³⁺: ⁴F9/2 → ⁴I15/2 upconversion photo...

This manuscript presents the preparation of well-oriented @MgAl-layered double hydroxides (LDHs). It extends the reported preparation of SiO2@MgAl-LDH core-shell material (Si/(Si + Mg + Al) molar ratio = 0.54, Mg/Al = 2). There is introduced a new method for the gradual and controlled removal of the SiO2 core from SiO2@MgAl-LDH on treatment with a...

Proper respiratory tract protection is the key factor to limiting the rate of COVID-19 spread and providing a safe environment for health care workers. Traditional N95 (FFP2) respirators are not easy to regenerate and thus create certain financial and ecological burdens; moreover, their quality may vary significantly. A solution that would overcome...

In this study, better-quality stoichiometric SnS thin films were prepared by atomic layer deposition (ALD) using a liquid divalent Sn precursor, N, N′-di-t-butyl-2-methylpropane-1,2-diamido tin(II) [Sn(dmpa)], and H2S. A relatively high growth per ALD cycle (GPC) value of approximately 0.13 nm/cycle was achieved at 125 °C. Furthermore, crystalline...

The surface of any binary or multi-component nanocrystal has imperfections and defects. The number of surface defects depends both on the nature of the nanomaterial and on the method of its preparation. One of the possibilities to confine the number of surface defects is the epitaxial growth of the shell, which leads to a change in the physical pro...

The crystallization behavior of the (GeSe2)x(Sb2Se3)1-x system for x = 0.6–0.9 was studied indirectly by using differential scanning calorimetry (DSC) under non-isothermal conditions. DSC experiments revealed a complex behavior consisting of several subprocesses. Using the direct observation method of infrared microscopy and X-ray diffractometry, w...

Crystallization behavior of three commercial Fe-Si-Cr-B amorphous alloys (AFSC, SAP-2KC and AW2-08) was investigated by means of differential scanning calorimetry, optical and scanning electron microscopies, and X-ray diffraction analysis. The complex crystallization kinetics was described using the transformation mechanism of multiple overlapping...

In this work, the chalcogenide glass thin films of As-Ge-Sb-S system were prepared in specular optical quality by spin-coating from mixtures of separate As40S60 and Ge20Sb5S75 glass solutions. The five compositions were studied in total (0, 25, 50, 75 and 100 at.% of As40S60) to examine the possibility of deposition of quaternary chalcogenide glass...

Hydrogels based on a graft copolymer of acrylic acid (AA) and acrylamide (AAm) on a backbone of starch, obtained from different natural sources, have been prepared and characterised for potential agricultural use, as soil moisture regulators and nutrient sources for plant nutrition. Five types of starch were used: corn, waxy corn, wheat, potato and...

Chalcogenide As33S67 vitreous thin films prepared by thermal evaporation and spin-coating method from n-propylamine and n-hexylamine based solutions were structured using hot embossing technique with soft polydimethylsiloxane (PDMS) stamps. The influence of deposition method and conditions as well as thermal history of the samples was studied. Obta...

The mobility of structural units in amorphous materials has a significant influence on crystal growth. In this study, we show that the motion of structural units from the amorphous matrix to the growing crystals in the volume of the Se95Te5 bulk samples can be adequately described by viscosity. Nevertheless, surface crystal growth results in a much...

In this research, a binary eutectic composition of KCl and MgCl2 supported over lanthanum exchanged FAU (faujasite) zeolite has been investigated for the oxidative dehydrogenation (ODH) of ethane. The catalyst was prepared by the thermal treatment of La-FAU with a mechanical mixture of alkali chlorides under a flow of helium at 500 °C. The eutectic...

This paper deals with the development of acrylic latexes providing high-performance water-resistant coatings. For this purpose, mutual effects of anionic surfactant type (ordinary and polymerizable), covalent intra- and/or interparticle crosslinking (introduced by allyl methacrylate copolymerization and keto-hydrazide reaction, respectively) and io...

Introduction: Moldavites are tektites with a beautiful, mostly green discoloration and a very pronounced sculpture (Fig.1), which have been studied many times e.g. [1-3]).According to the most probable theory, they were formed 14.5 million years ago together with the Ries crater meteorite impact in Germany. They belong to the mid-European tektite s...

Quite recently, nanosized rare-earth (RE) fluorides have been gaining importance due to their ability to form nanocomposites that are capable to absorb ionizing radiation. The efficiency of these materials may vary under the influence of external factors and under the growing conditions of nanocrystals. In this paper a novel effective approach to t...

Post-thermal annealing treatment is an effective process employing the thin film structure modifications and compositional properties. In this article, we present a detailed investigation and understanding of the changes in the phase, crystal structure, microstructure, and optoelectrical properties of tin nitride (SnNx) thin films. These were depos...

Chalcogenide glass of As50Se50 composition have been intensively studied for its interesting physical and chemical properties. Presented manuscript explores the applicability of As50Se50 thermally evaporated thin films in electron beam lithography exploiting wet etching in amine based solution. As50Se50 films proved to be highly sensitive negative...

Chalcogenide glass thin films are frequently sensitive to various kinds of radiation (e.g., ultraviolet [UV]/visible [VIS], X-ray, electron beam). Structure of the material can be significantly altered by suitable irradiation causing either advanced polymerization or bond cleavage. Structural changes consequently influence the glass resistance to t...

A spectroscopic ellipsometry study on as-deposited and annealed non-stoichiometric indium zinc tin oxide thin films of four different compositions prepared by RF magnetron sputtering was conducted. Multi-sample analysis with two sets of samples sputtered onto glass slides and silicon wafers, together with the analysis of the samples onto each subst...

Solid solution AgInS2-ZnS nanostructures were prepared by reacting (Z)-1- (octadec-9-enyl)-3-phenylthiourea and 1-dodecanethiol with the corresponding metal linoleates. The combination of sulfur sources in modified ratios, which individually do not lead to significant results, resulted in the successful formation of nanorod-shaped heterostructures....

Solution processed thin chalcogenide films gain attention due to their interesting optical properties and simplicity of the deposition. The influence of the aliphatic chain length in primary amines used for As33S67 thin films deposition by spin-coating and their subsequent characterization had been studied in this paper, particularly films prepared...

In this work, we studied the effect of alkali-activated zeolite foams modifications on properties and catalytic activity of cobalt phases in the process of catalytic decomposition of N2O. The zeolite foam supports were prepared by alkali activation of natural zeolite followed by acid leaching and ion exchange. The cobalt catalysts were synthesised...

The Ge25Se75, Ge20Se80 and Ge15Se85 thin films were deposited in specular optical quality from n-propylamine - methanol solvent mixture by spin-coating technique. As-prepared solution processed thin films were thermally stabilized to reduce the content of organic solvent residuals and optical properties, surface topography, composition, structure a...

Non-isothermal differential scanning calorimetry was used to study the influences of particle size and mechanically induced defects on the recrystallization kinetics of amorphous Enzalutamide. Enzalutamide prepared by hot melt extrusion and spray-drying was used as a model material. The recrystallization rate was primarily accelerated by the presen...

Semiconductor Quantum Dots (QDs) have attracted a great attention due to their unique optical and chemical properties. An increasing demand for size- and shape uniformity of QDs, high quantum yield (QY) and photochemical stability can be resolved by synthetic methods. Here we report a study of the effect of the precursors' ratios within the synthes...

Doping of semiconductor quantum dots (QDs) by transition metals (such as Mn, Cu, Ni, etc.) is a great technique to impact the optical and structural properties of the host materials. The introduction of a small amount of impurity into the host semiconductor matrix leads to the shift of PL emission due to the change in the recombination process. The...

In this study, a universal Ge2Sb2Te5 phase change material was sputtered to obtain a layered structure. The crystalline phase of this material was prepared by annealing. SEM (scanning electron microscopy) and HRTEM (high-resolution transmission electron microscopy) images give confirmed that the sputtered Ge2Sb2Te5 thin film in crystalline phase ha...

Ge20Sb5S75 thin films with high chemical resistance to aliphatic amines were deposited from solutions of various glass concentrations (0.015-0.09 g of grinded glass material/ml of n-butylamine) by the spin-coating technique. As-prepared and annealed thin films were analyzed by spectroscopic ellipsometry and EDS (energy-dispersive X-ray spectroscopy...

In this paper, GeSe 2 thin film and glass ingot were prepared in a layered structure. Subsequently, the 2D amorphous monolayers were achieved from layered thin film and layered glass ingot. The thicknesses of monolayers from thin film range from 1.5 nm to 5 nm. And the thickness of monolayer from glass ingot is 7 μm. The fast cooling of material re...

Nucleation and growth of quantum dots (QDs) in solution are mainly controlled by the kinetic and thermal modes of the reaction process. By influencing any of them, the properties of the final nanocrystals can be tuned. The influences of temperature and chemical nature of starting materials on nucleation and, as a consequence, on the structure and o...

Solution processed thin chalcogenide films have attracted noteworthy attention due to the simplicity and thus low cost of applicable deposition techniques (e.g. spin-coating). In presented work we demonstrate the possibility to modify the thin films composition by altering the composition of source glass solution, which significantly improves tailo...

In this study, carbon microparticles (CMs) as a physical carrier to enhance the analyte transport efficiency for inductively coupled plasma mass spectrometry connected with electrothermal vaporization (ETV-ICP-MS) are proposed. Carbon microparticles mixed with samples or calibration standard solutions were dosed as a slurry into the graphite furnac...

Presented work compares optical and chemical properties of As30S70, As35S65 and As40S60 amorphous chalcogenide thin films deposited by thermal evaporation and by spin-coating. Structural and compositional differences given by the chosen deposition technique and post deposition treatment were revealed by Raman spectroscopy and EDS. Applicability of...