A. V. Trukhanov

• PhD
• Researcher at NUST MISiS/SSPA Scientific-Practical Materials Research Centre

CdTe films were obtained via discrete vacuum thermal evaporation (DVTE) with CdCl2 treatment and annealing in an air atmosphere. The CdTe samples were investigated using several techniques: energy-dispersive X-ray spectroscopy, scanning electron microscopy, atomic-force microscopy, grazing incidence X-ray diffraction, and Raman analysis. It has bee...

This study explores the impact of SrTiO3 (STO) chemical substitution on the crystal lattice and piezoelectric properties of BiFeO3–BaTiO3 (BFO-BTO) solid solution. The investigation involves crystal structure analysis based on the X-ray diffraction data and local-scale measurements of the piezoelectric properties using piezoresponse force microscop...

This paper explores the process of forming arrays of vertically oriented carbon nanotubes (CNTs) localized on metal electrodes using thin porous anodic alumina (PAA) on a solid substrate. On a silicon substrate, a titanium film served as the electrode layer, and an aluminium film served as the base layer in the initial film structure. A PAA templat...

This study examined flexible structures made of tantalum and bismuth (Ta/Bi) that were electrodeposited at different current densities (10–25 mA/cm2) using the galvanostatic regime. The density of the Ta/Bi structures was measured using the Archimedes method, and it was found to be 12.56 g/cm³. Microstructural parameter estimations, a chemical comp...

This article presents the results of the mechanisms of composite ZrO2-Al2O3 ceramics at the addition of a stabilizing V2O5 dopant, a change in the concentration of which results in in grain size enlargement, porosity reduction, and the formation of a substitution Zr(V)O2 phase in the structure at dopant concentrations greater than 0.10 M. During th...

Using soft chemistry methods, solid solutions of BaTi1‐xZrxO3 with 0 ≤ x ≤ 1 were obtained. The phase nature and features of the perovskite crystalline structure were established by x‐ray analysis and Fourier transform infrared (FTIR) spectroscopy. It was found that the average particle size increases with increasing content of zirconium cations. T...

Pd²⁺ ions substituted Co-Ni spinel ferrites nanoparticles (Co0.5Ni0.5PdxFe2−xO4 (Pd→CoNiFe2O4) NSFs) have been synthesized via a hydrothermal route assisted with polyethylene glycol (PEG). XRD, SEM, TEM, HR-TEM, VSM, and Mossbauer spectroscopy were used to provide a thorough analysis of the phase and structure, magnetic characteristics, and hyperfi...

In this study, the manganites Nd0.5Ca0.5MnO3, Nd0.5Sr0.5MnO3, and Pr0.5Ca0.5MnO3 were investigated using infrared spectroscopy. The experiments were conducted under standard conditions at room temperature, and the infrared spectra of the compounds were analyzed within the wavenumber range of 400–4000 cm−1. The observed frequencies primarily corresp...

Barium hexaferrite, Al substituted BaFe12-xAlxO19, Ti substituted BaFe12-xTixO19, and Al and Ti bisubstituted BaFe12-2xAlxTixO19 (with x = 0.0, 0.1, 0.5, and 1.0) were synthesized using a solid-phase method. The dopant content in the ceramics was controlled by its charge content. The effect of Al3+ or/and Ti4+ substitution on the crystal structure...

In a society increasingly infiltrated by digital and networking technologies, designing electromagnetic interference (EMI) shielding materials is critical for safeguarding sensitive electronic equipment and ensuring the smooth functioning of essential communication networks. This study focuses on the optimization of the properties of cobalt ferrite...

In this study, La1-xBaxMnO3 (x = 0.03, 0.27, 0.5) solid solutions were synthesized, and their structure and defect incorporation processes were investigated. The investigations were conducted using XRD, Positron Annihilation Lifetime, and Doppler Broadening Spectroscopy methods. Depending on the La/Ba ratio, the mechanism of defect incorporation in...

The microwave electromagnetic properties of ferromagnetic-paramagnetic and ferromagnetic-diamagnetic composites can be changed by varying the concentration of diamagnetic (paramagnetic) and ferromagnetic components. To implement the task of introducing such composites into production, research is required to find effective and simple synthesis tech...

Sintering aids play a crucial role in enhancing the properties of various ceramics, offering benefits such as increased density, lowered sintering temperatures, and changes in material electrical characteristics. This study focuses on investigating the impact of 3 wt.% additions of Bi2O3, B2O3, and V2O5 on the structural, morphological, and electri...

BaFeO-based hexaferrite compounds were synthesized by partially replacing Fe atoms with In atoms in barium hexaferrite, and their structural characteristics, thermal, and magnetic properties were studied. The crystal structure and lattice parameters of the hexaferrite were investigated using the X-ray diffraction method. Thermal property investigat...

The large inner surface of porous silicon (pSi) not only provides unique opportunities for introducing various foreign materials into the open pores, but is also responsible for a lot of processes during the pSi cathode polarization. PSi surface and contact effects are considered in the article. The space charge layer induced by both the surface st...

Thin films of CrSi2 of various thicknesses, deposited on the Si(111) surface using magnetron sputtering, have been examined through a combination of electron spectroscopy and microscopy techniques. In this article, the mechanism of film formation by sputtering in very short times by the method of magnetron sputtering was studied. In addition, the e...

Thin films of CrSi 2 of various thicknesses, deposited on the Si(111) surface using magnetron sputtering, have been examined through a combination of electron spectroscopy and microscopy techniques. In this article, the mechanism of film formation by sputtering in very short times by the method of magnetron sputtering was studied. In addition, the...

The paper considers the problem of the impact of low-frequency electromagnetic fields (EMF) generated by electric vehicles (EV) and household appliances on humans in modern society. The data on the effect of EMF on human health and regulatory documents establishing requirements for electromagnetic safety are presented. The method of electromagnetic...

Carbon-based nanocomposites (NCs) attracted much attention in heterogeneous catalysis to remove organic dyes. Herein, a novel low-cost green approach was utilized to design a reduced graphene oxide (rGO) impregnated with Sn or Ag nanoparticles (NPs) using ginger extract as a green reducing agent. The synthesized NCs were characterized utilizing X-r...

Polycrystals of solid solutions MnxFe1−xIn2S4 were prepared by the two-temperature method. The degrees of phase transformations were defined by differential thermal analysis (DTA), and a phase diagram of the MnIn2S4–FeIn2S4 system was obtained. The phase diagram is described by a narrow crystallization interval and classified as type I according to...

In this work, the dielectric and electrical properties of the complex oxides La0.5Ba0.5MnO3 and La0.97Ba0.03MnO3 were studied. The studies were carried out at a temperature T = 25–225 °C and a frequency f = 20–10⁶ Hz ranges. For these compounds, the values of physical parameters (dielectric constant, dielectric losses, dielectric constant and elect...

In the ambit of this investigation, we delved into the properties of (Co/Ni)Fe2O4 spinel nanoparticles (CNSNs) with a spectrum of Co/Ni ratios, delineated as Co1-xNixFe2O4, where x adopts values of 0.0, 0.3, 0.5, 0.7 and 1.0. The synthesis of these CNSNs was adeptly executed via the citrate precursor technique. This study meticulously examined the...

Exchange‐coupled hard–soft bi‐magnetic ferrites can be used as isolators, microwave absorption materials, filters, hyperthermia materials, and biosensors with improved energy properties. The nanocomposites with the chemical composition SrInxFe12‐xO4/Ni0.5Zn05Fe2O4 (where x varies from 0.00 to 0.04) have the advantages of both materials: spinel and...

Com posite materials were produced using the chemical curing method, with varying tungsten (W) content ranging from 0 to 80%, and based on epoxy resin. Analysis of the sample's microstructure indicated that as the W content increased, there was a more even distribution of grains within the epoxy resin matrix. However, for samples with a content up...

Employing an advanced citrate precursor methodology, we successfully synthesized nanoscale spinel ferrites, denoted as Mg1-xZnxFe2O4 (where x ranges between 0.0 and 1.0) or MZFO. Comprehensive analysis, utilizing state-of-the-art X-ray diffraction (XRD) techniques, demonstrated the defining attributes of the crystal structure. All examined specimen...

The structural and electronic properties of ReS2 different forms — three-dimensional bulk and two-dimensional monolayer — were studied within density functional theory and pseudopotentials. A method for standardizing the description of bulk unit cells and "artificial" slab unit cells for DFT research has been proposed. The preference of this method...

This research focuses on the synthesis of nanoscale cobalt spinel ferrite (CoFe2O4) via the sol-gel auto-combustion method and its integration with polyvinylidene fluoride (PVDF) to fabricate CoFe2O4-PVDF nanocomposites. The characterization of cobalt ferrite, using techniques such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy...

This work examined the influence of zirconium concentration on barium titanate (BZT) BaZr x Ti 1−x O 3 , with (x = 0, 0.15, 0.50, 0.75, and 1), produced by the tartrate precursor technique. The Fourier transform infrared (FTIR) spectra support the X-ray diffraction (XRD) results regarding formation of the perovskite structure. Grain size grows with...

In the presented work, comparative studies of the dielectric and electrical properties of La0.73Ba0.27MnO3 compounds were carried out at the temperature range T = 25-225 °C and frequencies range f = 20-106 Hz. Temperature and frequency dependences of the real and imaginary parts of the dielectric constant, dielectric loss angle, dielectric constant...

Сomposite materials based on the epoxy resin–W system with varying W content (0–80 %) were obtained using the method of chemical curing. Microstructural investigations of the samples showed that with increasing W content there is a more uniform distribution of grains in the epoxy resin matrix could be observed. Agglomeration of W grains is noted fo...

The thermal properties of the compounds La0.5Ba0.5MnO3, La0.73Ba0.27MnO3 and La0.97Ba0.03MnO3 were studied in the temperature range 25 °C < T < 950 °C. The studies were carried out using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). Although several thermal effects were observed in the study objects, in each of them...

Agricultural production, sometimes known as “farming,” is the process of cultivating certain plants and rearing livestock to provide food, feed, fiber, and a variety of other desirable items. Agriculture is the core of most emerging countries, providing both direct and indirect nourishment for humans. Agri-food production is critical since it is on...

Single crystals of Cu2ZnGeSe4 and Cu2ZnGeS4 solid solutions were developed and successfully obtained using the chemical vapor transfer method, with iodine acting as a transporter. The structure, compositional dependences of lattice parameters, pycnometric and X-ray densities and microhardness were determined. The chemical composition determined by...

The results of studies of the effect of magnetic pulse treatment on the local structure and magnetic properties of substituted ferrite for microwave devices are presented. The change in the magnetic properties of ferrites as a result of exposure to them by pulses of a weak magnetic field indicates the possibility of controlling the parameters of fe...

In this study, nanoparticles of Ba 1Àx Sr x TiO 3 (where x = 0.0, 0.1, 0.2, 0.3, and 0.4) have been prepared using a chemical method. One of these pure perovskite compositions (x = 0.0) has been then mixed with Polyvinylidene fluoride (PVDF) polymer in different weight ratios (70% BaTiO 3 :30% PVDF, 50% BaTiO 3 :50% PVDF, and 30% BaTiO 3 :70% PVDF)...

The present study we report the fabrication of GO-CdS quantum dots modified on glassy carbon electrode (GO-CdS/GCE) and is applied to monitor the levels of dopamine and tyrosine using electrochemical signal enhancement. GO-CdS quantum dots were prepared by using ultrasonication method followed by hydrothermal synthesis in a facile approach. The pre...

The study of the relationship between the effect of phase composition variation on the dielectric characteristics of ferroelectric ceramics is one of the most important fundamental questions, the answer to which will allow us to determine the potential of using ferroelectrics in microelectronic applications and the creation of alternative energy so...

A new composite material of W–Bi2O3 system is proposed as a protection against ionizing radiation. An improved method of hot isostatic pressing for the preparation of composite materials is proposed. The duration of sintering under conditions of high pressure and temperature was 3 minutes. The study of the morphology and chemical composition of W–B...

The research delves into successfully creating Mg1-xZnxFe2O4 nanoparticles, where 0.0≤x≤1.0 was achieved via an amalgamation of the citrate precursor methodology. Fundamental structural properties were delineated through the deployment of X-ray diffraction (XRD) analysis and Scanning Electron Microscopy (SEM). The outcomes depict the synthesized fe...

Nanosized spinel ferrites Co1−xNixFe2O4 (where x = 0.0–1.0) or CNFO have been produced using a chemical method. The crystal structure's characteristics have been determined through the utilization of X-ray diffraction (XRD). It has been demonstrated that all samples have a single phase with cubic syngony (space group Fd3̄m). The lattice parameter a...

Complex oxides La0.97Ba0.03MnO3, La0.73Ba0.27MnO3 and La0.5Ba0.5MnO3 were synthesized and their structural properties were studied. The structural investigation of the samples is done by incorporating X-ray diffraction (XRD) and scanning electron microscope (SEM) technique at room temperature. The Rietveld method was successfully used for the analy...

W-Bi2O3 composites were fabricated using the hot isostatic pressing technique for the first time. The duration of the samples sintering was 3 minutes under conditions of high pressure and temperature. The study of microstructural features and chemical composition of sintered samples was carried out using scanning electron microscopy and energy-disp...

The effect of doping of Co²⁺ and Sn⁴⁺ in Ba0.5Sr0.5Fe12-2xO19 hexaferrite with different concentrations (x = 0.2, 0.4, 0.6, 0.8, and 1.0) was studied by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), complex impedance spectroscopy, and analyzed as a dielectric resonating antenna (DRA) at room temperature. The samples were produced and...

Spacecraft are exposed to a number of factors in the outer space: irradiation by electron flows, high-energy ions, solar electromagnetic radiation, plasma irradiation, and a stream of meteorite particles. All these factors initiate various physical and chemical processes in spacecraft materials, which can eventually lead to failure. To ensure relia...

Manganese-doped MnxFe3−xO4 (x = 0.0, 0.2, 0.6, 0.8) spinel ferrites were produced via co-precipitation using the ethanolamine. XRD results confirmed the formation of the spinel phase. The well-crystallized particles of the ferrite spinel phase had linear sizes in the range of 5–9 nm. It was found that the lattice parameter increases gradually as th...

The polycrystalline SrFe12O19 deeply substituted up to at.67% by Al3+, Ga3+, In3+, Co3+, and Cr3+cations with a high configurational mixing entropy were prepared by solid-phase synthesis. Phase purity and unit cell parameters were obtained from XRD and analyzed vs. the average ionic radius of the iron sublattice. The crystallite size varied around...

Structural, electronic, elastic and magnetic properties of CeCu3-x Mn x V4O12 (x = 0, 1, 2 and 3) system have been carried out through DFT using GGA, GGA+U and HF potential. The investigation of structural optimization reveals that lattice parameters of the understudy system is reliable with the reported results and are increasing with the Mn subst...

This study announces the anomalous phase separation in CoNiP alloy electroplating. The observed phenomenon of the formation of magnetic bubbles was described for the first time for this triple CoNiP system. This study briefly covers all stages of magnetic bubble formation, starting from the formation of an amorphous phosphor-rich sublayer, followed...

The aim of these work was to investigate low temperature fast synthesis of cobalt spinel ferrite polycrystalline ceramics. The idea of combining high temperature and high pressures was in the possibility of a sharp decrease in the synthesis time by the lowering the threshold for activation of chemical interaction due to increasing the rate of diffu...

It is common knowledge that the O2 evolution reaction (OER) is a crucial half-reaction in the electrolysis of water. However, it is currently difficult to create inexpensive OER electrode materials in a way that is efficient, simple, and environmentally friendly. In this research, metal oxy-hydroxides with numerous oxygen defects (M-OOHv) are creat...