Correlation of Dielectric Properties and Vibrational Spectra of Composite PVDF/Salt Fibers.

Nitride salts were added to polyvinylidene fluoride fibers and then the fiber mats were prepared by electrospinning. An experimental investigation of the structure was provided by Raman, FTIR, SEM, and XRD. The phase ratio of the polymer was studied both theoretically and experimentally in connection with the addition of the hydrates Mg(NO), Ca(NO), and Zn(NO) salts.

Vibrational spectroscopy of dynamic interactions and relaxation processes in ionic systems.

In recent years, there has been a boom in the publication of research results on ionic (electrolyte) systems used in the creation of electrochemical energy systems (batteries, supercapacitors, etc.). One of the alternative ways to obtain dynamic information in ionic systems is spectroscopic experiments, and the most valuable information on the behavior of condensed systems at picosecond and adjacent time intervals is provided by vibrational spectroscopy.

Exploring RF Magnetron Sputtering Growth Composite Thin Film BiFeO-BiFeO on C-Plane AlO Substrate.

Nanocomposite films of BiFeO-BiFeO were fabricated on a sapphire substrate AlO using the method of gas discharge high-frequency cathodic sputtering of a ceramic target with a stoichiometric composition in an oxygen atmosphere. The results of the film analysis using X-ray structural analysis, Raman scattering, XPS, and atomic force microscopy are presented. The lattice parameters, surface topography, chemical composition of the films, concentration, and average sizes of the crystallites for each phase were determined.

Combination NIPS/TIPS Synthesis of α-FeO and α/γ-FeO Doped PVDF Composite for Efficient Piezocatalytic Degradation of Rhodamine B.

Highly porous membranes based on polyvinylidene fluoride (PVDF) with the addition of nanoscale particles of non-magnetic and magnetic iron oxides were synthesized using a combined method of non-solvent induced phase separation (NIPS) and thermo-induced phase separation (TIPS) based on the technique developed by Dr. Blade. The obtained membranes were characterized using SEM, EDS, XRD, IR, diffuse reflectance spectroscopy, and fluorescent microscopy.

A Porous Nanostructured ZnO Layer for Ultraviolet Sensing with Quartz Crystal Microbalance Technique.

Porous films of metals and metal oxides have gained growing attention as potential materials for use in applications that require large, specific surface areas, such as sensors, supercapacitors, and batteries. In this study, a "black-metal"-like porous Zn-ZnO composite layer was grown by room temperature co-sputtering of Zn metal and ZnO:Ga (3 at/%) ceramic targets. Following deposition, a porous ZnO layer was obtained by a subsequent thermal annealing process at 400 °C in air.

Hydrogen Bond-Induced Activation of Photocatalytic and Piezophotocatalytic Properties in Calcium Nitrate Doped Electrospun PVDF Fibers.

In this study, polyvinylidene fluoride (PVDF) fibers doped with hydrated calcium nitrate were prepared using electrospinning. The samples were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), optical spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), Raman, and photoluminescence (PL) spectroscopy. The results are complementary and confirm the presence of chemical hydrogen bonding between the polymer and the dopant.

Synthesis and Functional Characterization of CoFeO-BaTiO Magnetoelectric Nanocomposites for Biomedical Applications.

Nowadays, magnetoelectric nanomaterials are on their way to finding wide applications in biomedicine for various cancer and neurological disease treatment, which is mainly restricted by their relatively high toxicity and complex synthesis. This study for the first time reports novel magnetoelectric nanocomposites of CoFeO-BaTiO series with tuned magnetic phase structures, which were synthesized via a two-step chemical approach in polyol media. The magnetic CoFeO phases with x = 0.

Piezo-Enhanced Photocatalytic Activity of the Electrospun Fibrous Magnetic PVDF/BiFeO Membrane.

Creating stimulus-sensitive smart catalysts capable of decomposing organic dyes with high efficiency is a critical task in ecology. Combining the advantages of photoactive piezoelectric nanomaterials and ferroelectric polymers can effectively solve this problem by collecting mechanical vibrations and light energy. Using the electrospinning method, we synthesized hybrid polymer-inorganic nanocomposite fiber membranes based on polyvinylidene fluoride (PVDF) and bismuth ferrite (BFO).

Multiferroic/Polymer Flexible Structures Obtained by Atomic Layer Deposition.

The paper considers how a film of bismuth ferrite BiFeO (BFO) is formed on a polymeric flexible polyimide substrate at low temperature ALD (250 °C). Two samples of BFO/Polyimide with different thicknesses (42 nm, 77 nm) were studied. As the thickness increases, a crystalline BFO phase with magnetic and electrical properties inherent to a multiferroic is observed.

The Aleutians and Beyond: Distribution, Size Composition, and Catch Dynamics of the Aleutian Skate across the North Pacific.

The results of long-term (1948-2021) studies on the spatial and vertical distribution, dynamics of abundance, and size composition of the Aleutian skate in the North Pacific Ocean are presented. Maximum densities of this species were characteristic of the eastern Bering Sea slope, off the central Aleutian Islands, consisting of the Pacific waters off southeastern Kamchatka and the northern Kurils, and northeastern Sakhalin. This species was most abundant at depths of 100-600 m; in the cold months, migrates to greater depths for over-wintering, and in warm months it feeds at shallower depths.

Long-Term Changes in the Distribution and Abundance of Nine Deep-Water Skates (Arhynchobatidae: Rajiformes: Chondrichthyes) in the Northwestern Pacific.

Based on the analysis of long-term data from bottom trawl surveys (1977-2021), changes in the spatial distribution, position of the boundaries of the ranges and the catch rates of the nine most common deep-sea skates of the genus in the Russian waters of the Northwestern Pacific (, , , , , , , and ) are considered. During the surveyed period, significant changes in the spatial distribution were observed, which are probably due to both subjective reasons (changes in the number of trawling stations, surveyed depths, etc.) and climatic changes.

Brief Review of PVDF Properties and Applications Potential.

Currently, there is an ever-growing interest in carbon materials with increased deformation-strength, thermophysical parameters. Due to their unique physical and chemical properties, such materials have a wide range of applications in various industries. Many prospects for the use of polymer composite materials based on polyvinylidene fluoride (PVDF) for scientific and technical purposes explain the plethora of studies on their characteristics "structure-property", processing, application and ecology which keep appearing.

Plant Community of Pine Forests (Pinus kochiana, Pinaceae) of Dagestan.

The plant community of Dagestan pine forests, comprising 590 vascular plants species, was examined based on materials from field studies performed from 2012 to 2019. Taxonomic, biomorphological, florocoenotic, and geographical characteristics of the plant community showed its boreal and Mediterranean nature. Mesotrophic and eutrophic plants predominated in terms of soil fertility and mesophytes and mesoxerophytes, in terms of soil water availability.

Morphotropic Phase Boundary Enhanced Photocatalysis in Sm Doped BiFeO.

This paper presents the results of the synthesis of samarium-doped bismuth ferrite (BFO) nanoparticles by the solution combustion method. The dependence of BFO properties on the amount of the samarium (Sm) in the composition was studied. The synthesized nanocomposites were characterized by scanning electron microscopy SEM), X-ray diffractometry (XRD), Raman, Electron Diffuse Reflectance Spectroscopy (EDRS) and Electron Magnetic Resonance (EMR).

Calculation of Lipophilicity of Organophosphate Pesticides Using Density Functional Theory.

Higher lipophilicity facilitates the passage of a substance across lipid cell membranes, the blood-brain barrier and protein binding, and may also indicate its toxicity. We proposed eight methods for predicting the lipophilicity of the 22 most commonly used organophosphate pesticides. In this work, to determine the lipophilicity and thermodynamic parameters of the solvation of pesticides, we used methods of density functional theory with various basis sets, as well as modern Grimm methods.

The ZnO-InO Oxide System as a Material for Low-Temperature Deposition of Transparent Electrodes.

The development of optoelectronic devices based on flexible organic substrates substantially decreases the possible process temperatures during all stages of device manufacturing. This makes it urgent to search for new transparent conducting oxide (TCO) materials, cheaper than traditional indium-tin oxide (ITO), for the low-temperature deposition of transparent electrodes, a necessary component of most optoelectronic devices. The article presents the results of a vertically integrated study aimed at the low-temperature production of TCO thin films based on a zinc-indium oxide (ZIO) system with acceptable functional characteristics.

Boosting Magnetoelectric Effect in Polymer-Based Nanocomposites.

Polymer-based magnetoelectric composite materials have attracted a lot of attention due to their high potential in various types of applications as magnetic field sensors, energy harvesting, and biomedical devices. Current researches are focused on the increase in the efficiency of magnetoelectric transformation. In this work, a new strategy of arrangement of clusters of magnetic nanoparticles by an external magnetic field in PVDF and PFVD-TrFE matrixes is proposed to increase the voltage coefficient (α) of the magnetoelectric effect.

Research of the structure and dynamic interactions of particles in the LiKNO- R (R = α-AlO, γ-AlO, SiO) and (LiNO-LiClO) - γ-AlO composites in various temperature conditions and phase states.

The paper presents a comprehensive study of the LiKNO- R (R = α-AlO, γ-AlO, SiO) and (LiNO - LiClO4) - γ- AlO composite salt systems by vibrational spectroscopy, X-ray diffractometry, and differential scanning calorimetry. According to the results of Raman spectra and XRD analysis, it has been found that in the case of a sufficiently small filler (15 nm-γ-AlO and SiO), an amorphous phase appears, both for systems based on LiKNO and for the nanocomposite based on (LiNO)-(LiClO). In the case of nanocomposites based on the LiKNO system, this additionally leads to the formation of the metastable KNO (R3m) phase.

Relativistic mechanism of chiral magnetic current in Weyl semimetals with tilted dispersion.

The chiral magnetic effect is a one of the exotic bulk transport properties of the Weyl semimetals. Because of the Nielsen-Ninomiya 'no-go theorem', the total chiral magnetic current is absent in the equilibrium state. One of the mechanisms for generating this current is the chiral anomaly.