A5059662214- Advanced Photocatalysis Techniques
- High Entropy Alloys Studies
- Additive Manufacturing Materials and Processes
- Gas Sensing Nanomaterials and Sensors
- Laser-Ablation Synthesis of Nanoparticles
- ZnO doping and properties
- Quantum Dots Synthesis And Properties
- Gold and Silver Nanoparticles Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Advanced materials and composites
- Carbon Nanotubes in Composites
- Luminescence Properties of Advanced Materials
- Nanoparticles: synthesis and applications
- Advanced Nanomaterials in Catalysis
- Material Properties and Applications
- Metal Alloys Wear and Properties
- Microstructure and Mechanical Properties of Steels
- Copper-based nanomaterials and applications
- Covalent Organic Framework Applications
- High-Temperature Coating Behaviors
- Welding Techniques and Residual Stresses
- Advanced ceramic materials synthesis
- Diamond and Carbon-based Materials Research
- MXene and MAX Phase Materials
- Perovskite Materials and Applications
G.V. Kurdyumov Institute for Metal Physics
2016-2025
National Academy of Sciences of Ukraine
2002-2023
Taras Shevchenko National University of Kyiv
2021-2023
Kyiv National University of Technologies and Design
2019
VinTech (United States)
2013-2017
Nanomed (Brazil)
2017
L.V. Pisarzhevskii Institute of Physical Chemistry
2016
Institute of Physics
2015
One of the requirements an efficient surface-enhanced Raman spectroscopy (SERS) substrate is a developed surface morphology with high density "hot spots", nm-scale spacings between plasmonic nanoparticles. Of particular interest are architectures that could enable self-localization (enrichment) analyte in hot spots. We report straightforward method fabrication SERS substrates comply these requirements. The basis large-area film tightly packed SiO2 spheres formed by their quick...
Abstract S‐doped porous carbon nitride was obtained by a simple method using melamine and sulfuric acid. The synthesized material exhibits high BET specific surface area (75 m 2 /g) compared to non‐doped C 3 N 4 (25 /g). According X‐ray photoelectron spectroscopy sulfur atoms substitute nitrogen forming C−S bonds in the structure of nitride. Incorporation into results significant increase light absorbance intensity especially UV region undoped sample. Synthesized found be p‐type...
Fungi produce and excrete various proteins, enzymes, polysaccharides, secondary metabolites, which may be used as media for the "green" synthesis of metal semiconductor nanoparticles (NPs). ZnO NPs with a flower-like morphology were synthesized by an affordable colloidal route, using aqueous extract
Стекла 20 моль% Ga2S3 – 60 GeS2 Sb2S3: Er2S3 (1–4 моль%); Nd2S3 (2 моль%) отримано методом гартування. На основi дослiджень спектрiв оптичного поглинання встановлено смуги iз максимумами 655, 755, 810, 885, 980 i 1540 нм. При збудженнi фотолюмiнесценцiї випромiнюванням з λ = 805 нм у спектрi з’являються при 1070, 1350, 1540, 1700 2490 нм, що вiдповiдає переходам 4F3/2 → 4I11/2 (Nd3+), 4I13/2 4I15/2 (Er3+), 4I9/2 (Nd3+) f-оболонках обох рiдкоземельних металiв. Високi значення коефiцiєнта...
The aim of the study is a comparative analysis micromechanical and microtribological properties cathodic arc-deposited Mo, Cr, Ta coatings using nanoindentation scratch test techniques as well dry sliding with wear tracks post-examination worn volume determination interference profilometry. A new technique based on statistical processing registered sclerograms during multi-pass adopted for resistance assessment rough surfaces suggested. New approaches to testing indentation tester equipped...
In the current contribution, wire arc additive manufacturing of non-equimolar Co-Cr-Fe-Mn-Ni high-entropy alloy using gas metal welding (GMAW) with powder-cored (MPCW) is proposed. The powder's filler designed feedstock contains Co-Cr-Mn-Ni components in equal atomic amounts relative to each other Fe stripe as a shield. proposed method provides possibility build bulk samples desired characteristics. Developed work approach superior number indicators such alternative methods obtaining HEAs...
The wetting of (Ti, Zr, Hf, Nb, Ta)C) high entropy carbide ceramics by molten metals was studied using a sessile drop method in vacuum environment. Fe, Co, and Ni demonstrate good with the Ta)C substrate forming final contact angle 20°, 30°, 22°, respectively. A detailed characterization solidified couples performed scanning electronic microscopy to study microstructure interaction region. Dissolution components into metal accompanied penetration ceramic's found occur during high-temperature...
A quick one-step fabrication of efficient SERS substrates by a modified approach based on silver-mirror reaction (using Tollens’ reagent) is reported. Commercially available microscope slides or cover glass (coverslips) were used as-received, without special surface treatment. In contrast to the commonly two-step process, composition Tollens reagent was use single-step process. The obtained rather homogeneous films densely packed nanoislands are promising for application as Surface-Enhanced...
A kombucha multimicrobial culture (KMC) was exposed to simulated Mars-like conditions in low Earth orbit (LEO). The study part of the BIOlogy and Mars EXperiment (BIOMEX), which accommodated European Space Agency's EXPOSE-R2 facility, outside International Station. aim investigate capability a KMC microecosystem survive LEO. During 18-month exposure period, desiccated samples, represented by living cellulose-based films, were subjected anoxic ultraviolet (UV) radiation, as prevalent at...
The goal of the present work is a systematic study on an influence strain rate mechanical response and microstructure evolution selected titanium-based materials, i.e., commercial pure titanium, Ti-6Al-4V alloy with lamellar globular microstructures produced via conventional cast wrought technology, as well fabricated using blended elemental powder metallurgy (BEPM). quasi-static high-strain-rate compression tests split Hopkinson pressure bar (SHPB) technique were performed specimens...
Purpose is to analyze influence mechanisms of physicochemical coal properties on the degree outburst risk as well desorption kinetics methane. Methods scanning electron microscopy (SEM), paramagnetic resonance (EPR), nuclear magnetic (NMR), infrared spectroscopy (IR) and Raman scattering (RS) have been applied. The samples taken from Donbas seams varying in their ranks (i.e. carbonization degree). Findings. It has identified that context hazardous zones, ratio between integral intensity...
The combined effects of severe plastic deformation induced by high-frequency mechanical impact (HFMI) treatment and the electric discharge surface alloying (EDSA) with chromium on corrosion fatigue life low-carbon S355 steel transverse non-load-carrying specimens are studied in this paper. First, for various alternations HFMI + EDSA process, alloyed layer integrity depths were analyzed using scanning electron microscopy (SEM) accompanied energy dispersive spectroscopy (EDS) hardness...
Kombucha microbial community (KMC) produces a cellulose-based biopolymer of industrial importance and probiotic beverage. KMC-derived pellicle film is known as highly adaptive macrocolony—a stratified prokaryotes eukaryotes. In the framework multipurpose international astrobiological project "BIOlogy Mars Experiment (BIOMEX)," which aims to study vitality prokaryotic eukaryotic organisms stability selected biomarkers in low Earth orbit Mars-like environment, cellulose polymer structural...